Sierra has an obsessive crush on Cody, to the point that it is considered to be constantly stalking. Throughout the third season, Sierra continuously disturbs Cody while he is asleep, stealing his belongings, and refusing to leave him alone. Sierra is also extremely jealous of any girl (Gwen in particular, due to Cody's feelings for her) getting close to Cody, and will not hesitate to attack anyone who hurts or is harsh to him. Cody, on the other hand, rejects her, finding her creepy due to her constant stalking. He desperately tries to eliminate her in every elimination ceremony, even if Sierra has immunity at the time. However, by the end of the season, Cody is much more warm towards her, even referring to them as best friends.
Cody never participates in Total Drama All-Stars while Sierra does. As a running gag, Sierra will often mention him several times or pretend that Cody is around. However, being away from Cody for too long as well as losing all her photos from her cell phone (after it was destroyed by Mal) puts strain on Sierra's unstable mind to the point that she imagines Cameron, and sometimes her entire team, to be Cody.
In her debut episode, Sierra reveals that has an interest in the Total Drama series in general, and has a website for all of the contestants, she appears to have a specific interest in Cody. Sierra is seen spying on Cody and The Drama Brothers' party as they go skinny dipping into a pool, as well as being fascinated with them and the rest of the Total Drama cast. She and Cody first interact on the red carpet when Alejandro pushes Cody down, and Sierra shouts his name in a concerned way. At the end of the episode, when Sierra is in the confessional, she says she is excited to be in the next season because all her Cody blog questions will be answered. These questions include "How many freckles does he have on his back?", "What kind of deodorant does he use?", "How many times does Cody sleep facing west?", and "What song does he sing in the shower?" At the mention of the last question, she starts giggling uncontrollably, eventually saying that the last question "will definitely be a six-month analysis".
In the opening sequence for this season, Cody falls off the Statue of Liberty, and lands in Sierra's arms. Sierra smiles, and Cody looks blankly up at her. Sierra then hugs him awkwardly, shocking him, and making him unable to breathe. Later, when the contestants parachute off the human pyramid they make, Sierra is shown to be holding Cody bridal style as they land on the ground.Come Fly With Us, Sierra and Cody sing together. In the "Pyramid Over Under" challenge, Sierra goes with Heather, but Sierra carries Cody out of the pyramid when they make it out, and she is happy that they find him. She shares a group hug with him (hugging his head to her chest) and Heather, but end up on different teams. Cody is placed on Team Amazon and Sierra is placed on Team Chris Is Really Really Really Really Hot.
Sierra raves about Cody to Izzy, revealing that he still sleeps with a stuffed emu. She admits that she posed as a telemarketer to get more information on Cody from his aunt. Later in the episode, she hugs Cody and tells him that she "knows that he wishes they were on the same team too". This prompts Izzy to say that they make a cute couple. Sierra and Izzy then decide to switch teams so that Sierra can be with Cody and Izzy can be with Owen, which excites her.
In the beginning of the episode, Sierra is seen in first class searching through Cody's backpack and sniffing his shoe, until a shoelace gets stuck up her nose. During Before We Die, she says she wants to marry Cody and hugs him, terrifying him. When Sierra and Cody find out that they are paired up in the pinball challenge, she tackles him in delight. As their pinball flies in the air, she clings onto Cody in fear. Throughout the challenge, Sierra kisses Cody many times and does not seem to care that her team has lost the first part of the challenge. While in the confessional after the challenge, Cody is disgusted at finding Sierra's gum in his ear.
In the second challenge after Team Amazon is arguing and quit the challenge, Cody and Sierra are forced to make their own video themselves, which wins the challenge. Sierra agrees with Gwen's statement of Cody's work being amazing, and decides to have a group hug, but she doesn't allow the other girls to hug Cody, possibly due to either them not helping, or because she's crazy about Cody and doesn't want anyone else to have him. While Chris signs off the show, and shows a picture of Team Amazon, Sierra is shown hugging Cody's head, frightening him.
Sierra is massaging Cody's feet during the flight to their next destination. Cody does not really want his feet to be touched, but Sierra ignores him and presses a pressure point to paralyze him. Once everyone arrives at the Yukon, Cody tries to cuddle Gwen for warmth, but she rejects him and Sierra hugs him instead. Later, as a polar bear tries to eat Owen and Cody, Sierra throws chunks of ice at it, claiming she will not write an obituary for her Cody blog. She then grabs a large fish from the water, and uses it as an oar and the ice she's standing on as a boat, and rescues Cody, wishing she froze to death instead of him and him stuttering an agreement because of her clinginess. Due to him freezing, she spends most of the second half of the episode carrying him.
While on the flight, Sierra tries to warm up Cody by rubbing his legs, saying that whenever he has cold feet, he'll think of her. To this he replies by saying "no kidding" in a disgusted tone. When Sierra gets distracted by Heather and Alejandro, she inadvertently bends Cody's leg into an awkward position, causing him pain. While climbing up the Statue of Liberty, Sierra wants Cody to go before her so she could stare at his butt, saying it's "The best view in New York" and purrs, to which Cody groans embarrassingly and tries to cover his butt up. Later, Cody gets trapped in the Statue's cleavage, and Sierra saves him by swinging her rope towards him and pulling him to safety by biting onto his leg. When sliding down the thirty story fire pole, Sierra screams Cody's name. Later, in Central Park, when Sierra picks up the large apple with her head in turtle pond, the Amazons cheer for her, while Cody says "You're so weird!"
While in the Total Drama Jumbo Jet, Cody places a net with a bell system around him to alert him if Sierra is trying to rub his feet again as he sleeps. She instead lets him suck her thumb, and watches him as he sleeps.
When he awakens, they both scream until Sierra laughs at how cute Cody is when he's terrified, squeezing his cheek. Cody is then seen in the confessional scrubbing his tongue with a toothbrush, wondering if Sierra keeps her thumbs in her armpits when no one's looking. Sierra is seen in the confessional right afterward, saying Cody is into her (while in fact, having her thumbs stuck under her armpits). Later, Sierra makes a raw meat snowman of Cody, called "Meat Cody". This results in there not being enough meat for Team Amazon to win the challenge. During the dancing challenge, Cody, not wanting to wear lederhosen in front of Gwen, tells Sierra she'd look hot in it. This makes her want it really badly, however Chris doesn't give it to her as a result, and makes Cody wear it instead. Sierra then sings a song on the dance platform about how much she loves Cody. During the second challenge, Sierra angrily kicks DJ off the platform after seeing Alejandro defeating Cody. When Team Amazon wins the challenge, Sierra squeezes Cody in victory.
At the beginning of the episode, Sierra is seen with a laptop made out of a pizza box and an actual mouse, which has a wallpaper of a muscular Cody carrying Sierra. Later in the episode, Sierra begs to hold onto Cody's medication for him so that she can be the one to inject him if he ever gets an allergy going through the jungle, but Cody does not trust Sierra with it, so he insists Gwen get this responsibility. Sierra gets really disappointed with this, as she argues she is the only one who knows what can make Cody go into anaphylactic shock. She lists everything from black and red ants to goat saliva. Cody agrees with Sierra in following the other teams in the left side, to which she appears in the confessional telling she listened to wedding bells when he agreed with her in front of everyone. Cody gets captured by a giant mosquito, but Sierra saves him by throwing a rock at it and catches him before he reaches the floor.
When Gwen uses X-ray glasses to check the color of Cody's underwear only to discover he isn't wearing any, Sierra immediately asks if she could borrow the glasses later. In a follow-up confessional, Sierra admits that she wants to get her arms extended if she wins the season, allowing her to reach Cody's pocket if this ever happened again. After they are freed from the Zing-Zings by Chef, Cody is bitten by a red ant, and runs out of the medication due to Gwen's accidental injection. Sierra offers to help by sucking the poison out of his thumb, which repulses Cody, although he makes no attempt to stop her due to being in dire need of help. Later, when Team Amazon lose and have to vote someone off, Sierra votes with Gwen and Courtney and votes for Heather, but only if (seeing Gwen as competition) Gwen stops being nice to Cody. At the Barf Bag Ceremony, Chris reveals the voting process, and it turns out that Cody voted for Sierra, frightened by her stalker-like behavior, calling her the stalker he always wanted, until he got one. This leaves Sierra heartbroken, teary-eyed, and confused, as she states in the confessional that even after she gave him foot-rubs and kept "hair collections", he still voted for her.
Although Sierra fawns over Cody almost all the time, she sulks and cries throughout this episode because of Cody voting for her in the last elimination ceremony. In the beginning of the episode, she is seen eating a gallon of ice cream and desperately crying, while Cody is hiding behind a baggage in the loser's cabin. She even sings Paris in the Springtime completely out of anger towards him, and ignores his efforts to apologize during his pity date with her. He even has all of her favorite foods which he later states that they're his favorites, but knows Sierra eats off his plate. She states that she knows he isn't doing this because he wants to. Near the episode's end, Cody eventually tries harder to get through to her. He tells her to stop crying, and that he is starting to prefer her always annoying him instead of crying over him. Cody says that obsessed Sierra was like being "slapped in the face", while upset Sierra was like being "kicked in the chestnuts". Sierra accepts his apology and hugs him. In the confessional, she happily claims that she loved the attention he finally gave her, and that she wasn't that mad at Cody, just playing hard-to-get to get him to pay more attention to her.
Throughout the episode, Sierra is constantly flirting with Cody. While relaxing in the first class section, Heather finds a toothbrush in the vent, which apparently belongs to Cody. Sierra states that she has been looking for it, and brushes her teeth with it, much to Cody's dismay since it was his last one. Later, when the contestants get thrown out of the plane into the water, Sierra is shown embracing Cody. During Sea Shanty Mix, Sierra and Cody are rowing and singing together. While Gwen and Courtney are climbing up a rock due to seeing a certain rock formation that appears to be Duncan, Sierra appears to be glad to be alone with Cody at last in the boat, in which she compliments how he smells like toothpaste, which causes Cody to back up and fall into the water. After Gwen and Courtney are coming down from the rock, Sierra tells them a story about how much people want to see others, in which Cody wants to end the story. She states that before she even knew Cody, she saw him out her bedroom window on a white horse. She said that she jumped out of her window to get on the horse, only to fall in a rosebush and ended up picking thorns out of her behind for about a week, then offers to show a scar.
In this episode, they are both seen next to each other in the economy class cabin. She hugs him while the plane is falling, but luckily they land in Jamaica. When the first challenge starts, he ends up jumping near a shark, and as she cheers and supports him by telling him to show it who is the boss, he gets beaten by it despite her motivational words. Sierra is thrilled to have Cody as her bobsledding partner during the timed sledding challenge, stating that this sport is really cozy, hugging him right away, leaving him shocked. They do well the first time, but end up strongly hitting the pool's wall. In the last round of the second challenge, Sierra tells Cody they are the only hope for their team, adding that it's their destiny and hugs him. She happily screams that they are ready and did the course once again.
The contestants reach London and Sierra is seen holding hands with Cody. She's talking about Queen Mary II getting engaged when she was just fifteen. This annoys Cody and he asks her to release his hand. When Team Amazon have to search for a clue somewhere in a guard's clothes, everyone on the team refuses and makes Gwen strip his clothes. To get out of it, Gwen tapes a mask of Cody's face onto the guard, which Sierra falls for and happily volunteers to undress him. When Sierra and Cody are alone looking for the next clue in the Tower of London, Sierra talks to Cody about how couples were punished for running away together in medieval times, while blocking him from walking away. Cody however is not interested in her stories about London's history. She then begs him for a kiss which he, as usual, refuses. She grabs Cody and the two scream out of fear when Jack the Ripper finds them. After Team Amazon wins the challenge, Sierra and Cody smile at each other.
During a confession where she admits to not having any problems with "Gwuncan", Sierra ponders about the birth of either "Siody" or "Coderra" in the web communities due to this season. During the fighting challenge between Team Chris Is Really Really Really Hot and Team Amazon, Cody tries to help Courtney and Sierra, but Courtney calls Cody a pipsqueak and tells him to stay out of the fight. This infuriates Sierra to the point that she stops strangling Owen and attacks Courtney. While holding Courtney in a head-lock position, Sierra tells Courtney to respect Cody. Cody tries to get both of his teammates to stop fighting, but Courtney slaps him away, which is enough for Sierra to tighten her grip and knock both herself and Courtney out. When Cody has to wear an Icarus costume for the tie-breaker challenge, Sierra raves about how Cody looks like an angel. She is thrilled when Cody punches Duncan, and congratulates Cody afterwards that fans will love him for it, which satisfies him. In an exclusive clip, Sierra uses her reward phone call to record her audio blog which she raves about Cody wearing his costume. After Gwen and Duncan's affair is revealed, she demands Cody to not fly, so they can vote Gwen off, but to save his actual crush, he ignores Sierra's orders, and wins the challenge.
When Team Amazon is stuck on the mine field outside Area 51, Sierra holds onto Cody. When Cody discovers an alien clone of himself in the warehouse, Sierra is surprised and excited to see "two Codys”. As she hugs them, the clone explodes covering them with a green substance, confusing Sierra.
Gwen asks Cody to join an alliance with her, as she wants to vote Courtney off, but Cody suggests Sierra to get booted. Gwen promises Sierra will be the next to go, but after Courtney. Cody desperately states Sierra stole all his underwear, and he has just swim trunks now. He appears in the confessional saying that after voting Duncan out, he will make an alliance to eliminate Sierra. She screams outside from the bathroom asking if Cody was alright. She holds him before jumping out of the plane. When her teammates are singing Shear the Sheep, Sierra, dressed like a groupie, hugs a shirtless Cody, only to be dragged off stage by Chef. During the challenge of shearing sheep, she jumps the cliff without the ropes, as she says she was doing that for Cody, but in the end, she hits the ground and doesn't participate in the challenge anymore. He votes her off, albeit unintentionally, due to being dizzy from his encounter with the dingo, and actually wishes to vote for Courtney. Cody apologizes to Gwen while shaking Sierra, making Sierra cry.
Cody is saddened because of Gwen's elimination, but Sierra is more than happy because she believes that now that Gwen is gone, he will find his "true love", which she believes to be herself, confidently thinking that he's already forgotten about Gwen. Throughout the episode, he sighs every time he hears Gwen's name, annoying Sierra. Later, she admits that he might still like Gwen, but that she will cheer him up, like a good wife does, remembering they already got married fourteen times in her head and twice in her online blog "I Dream of Cody”. At the end of her confession, she adds that this might happen in real life eventually, crossing her fingers for luck. In the challenge, Cody constructs a giant wooden replica of Gwen's face and Heather tries to destroy it. Even though Sierra probably doesn't like it either, she protects Cody from Heather, hitting her strongly, yelling "En garde!" They end up having a battle as Sierra screams for Heather to leave her boyfriend alone, accidentally hitting Courtney's head during the fight. She gets mad and folds her arms when she sees Cody drawing Gwen's face in the snow after they end the song We Built Gwen's Face. While in Gwen's face boat, Sierra tries to make Cody happy by embracing his face, making him vomit yet she is unfazed. When Team Chris Is Really Really Really Really Hot throw their cannonball, Sierra saves Cody from it, getting her stomach hurt in the process. He thanks her for this, making her happy. In the confessional, she tells that she will absolutely have to do a surgery and will have to go through months of therapy, but thinks it was worth it.
When all the contestants are on the boats in the river, just before they are about to go into the waterfall, Cody announces that he would let Sierra kiss him if they made it out alive, as "Like [they're] going to make it". Sierra hears this, and ties both the boats together and paddles incredibly fast. When they indeed make it onto land, Sierra promises Cody to restore his breath back to normal, and although he is certain his breath is fine, Sierra kisses Cody, interrupting him. Cody, however, is repulsed, and in the confessional he brushes his teeth repeatedly, and throws up. Sierra is so excited that there is a possibility of "marrying" Cody as a challenge that she starts to hyperventilate and passes out. She is extremely disappointed that she gets Alejandro as her husband that she shoves him back into the slot machine furiously. When Heather takes Alejandro, Sierra is drooling on the slot lever in hopes of getting Cody in her next attempt. She ends up being paired up with him by default, scaring him.
During the challenge when the brides must find their wedding dresses blindfolded, Cody doesn’t even try giving Sierra directions, not happy that he's working with her. Just as she hears Chris about to end the challenge, Sierra sprints to her dress and successfully wins the challenge for her and Cody, shocking him. As they cross a tightrope over Niagara Falls, Sierra offers to carry Cody. She reveals in the confessional that she is an ordained minister, and can get herself and Cody to be married for real. She then quickly goes through the marriage agreements so Cody can't hear as they cross the tightrope. Throughout the rest of the episode Sierra tries to make Cody say "I do", so that they can get married. After multiple failed attempts, Sierra gives up, and later asks Cody if he really needs to go the bathroom, to which he says "I do". This makes Sierra declare excitedly their 'official' marriage. At the elimination ceremony, she states that she wants to be known as Sierra-Cody from now on. Cody looks sickened and shocked at what has happened.
Sierra is smiling at Cody, while Cody is panicking in the loser cabin because they are supposedly married. During the race portion, Sierra gets Cody a donkey and later, while Cody is trying to tell her that he likes her as a friend, Sierra misunderstands thinking he meant he actually "like likes" her.
After the donkey kicks her off the Great Wall, Sierra lands in an old lady's house who gives her some love tea. The tea is supposed to make one attractive to their crush just by drinking it. Cody desperately pleads to Chris to ring the bell so Sierra cannot not be able to proceed to the next round, but he was too late. During the eating challenge, Cody and Sierra are sitting next to each other while Sierra drinks her love tea. When Chris says that whoever the winner of the eating challenge is is allowed to have a guest, Sierra immediately thinks about Cody. Sierra wins and chooses Cody as her guest, which he isn't pleased by. In first class Sierra pours tea over herself and leans over to Cody. It turns out that Cody is allergic to the tea, but Sierra saves him by jabbing an EpiPen into him.
Sierra gives Cody more of the Love-Me Tea, which causes him to be put into a comatose state and even hallucinates, imagining Sierra to be a polar bear, which terrifies him. Sierra mistakes his reaction as for finally falling in love with her. Since Cody is unable to move, she carries him around in a backpack and tells Chris she will play for him and herself in the challenges. When Cody gets stuck in a tree, Sierra demands help from Heather, but does not trust her around Cody, even though Heather says she is not attracted to him. Cody seems to agree to work with Heather if she votes for Sierra while Sierra is looking for a stick. After being kidnapped by baboons, Sierra goes to look for him and eventually finds him. The baboon that kidnaps him takes a liking to Cody, and even gives him a foot massage. This enrages Sierra and makes the baboon calls for backup, but they were no match for her and she successfully saves Cody, despite him being in no danger. At the Barf Bag ceremony, Cody apparently votes for Sierra again which she glared at him knowingly while he whistles casually.
Cody is shown to be happy with the fact that he managed to spend an entire night without being bugged by Sierra. Sierra is sad that they were separated for the time, and starts talking to Heather about her and Cody's marital problems. When collecting eggs, Sierra explains that she always wanted a family and names the first egg that hatches Cody Jr. Cody tries to explain they are just friends, but Cody admits that he does owe Sierra for caring for him in Africa when he was in a comatose state. He also says he would not mind if she helps him win the million. At the elimination ceremony, Cody cheers when Sierra is apparently eliminated, yet quickly takes it back. Sierra forgives him, asking he win for "them", but it is a fake elimination, so Sierra stays in the game, while Cody continues to be frightened.
While Cody is sleeping and talking about marrying Gwen, Sierra lets him nap on her lap. When he wakes up, she says he had a bad dream and wants to hug it out of him. She later states she is working on a surprise, and that Cody will love it while he seems concerned. Alejandro shows a picture to Sierra of Cody and Heather sleeping next to each other, which causes her to be angry. During the design-o-saur challenge, Sierra creates a heartbroken dinosaur which represents her betrayed feelings. Cody questions on why it is wearing a party hat to which Sierra explains it's Cody's birthday. Cody himself has forgotten it was his birthday and thanks Sierra, telling her it was sweet to remember. During the vote, Sierra says she normally would choose Cody's design, and Cody chose Sierra's design because he was touched that she remembered it is his birthday. Cody saves Sierra from a boulder during the digging challenge, and wonders why she was angry at him.
When he sees the photo of him and Heather, he explains it is impossible for that scenario to exist. They agree to work together to vote off Alejandro after finding out he sabotaged against them, and they agree to convince Heather to do the same. At the elimination ceremony, Sierra puts a hand on Cody's shoulder when he seems nervous hearing one vote is for him. Before the final choice was made, Sierra wants to get Cody's cake so she could celebrate his birthday. Unfortunately, the sparkler candles manage to make the plane explode, after the sparks hit the oil below Sierra's feet, which makes Cody worry about Sierra, as he runs towards her, asking if she's okay. Sierra is upset that her chocolate cake for Cody was destroyed, calling it his favorite flavor. After Chris eliminates Sierra out of anger for destroying his plane, Sierra tells Cody that he must win for both of them.
Cody digs up Sierra from the rubble, and Sierra says she had a dream like that once. When he puts her down in the wheelchair, he says his opinion of her has changed. Cody says at first he thought she was nothing more than a crazy fan, but now sees that she is a true friend. Sierra seems disappointed and asks Cody if they are possibly more than friends. Cody replies that they are "best" friends, which Sierra happily accepts. When Cody is searching the debris in order to find some way of getting to Hawaii, Sierra asks if she could search with him, which Cody thinks about, but lets her. She inadvertently gives Cody an idea for a hot air balloon, and wants Cody to take her wheelchair, and to leave without her, which means she would be left behind, but Cody says that he will take Sierra with him because she helped him get to the final three. During the flight they help each other and argue, to which Sierra points out that they are like an old married couple which left Cody horrified. When Chris says that Cody has to get rid of Sierra, Cody points out that he was allowed to use anything in the rubble. When the balloon crashes and Cody gives up, Sierra gives him fireworks and a pep talk. While buying the fireworks, she finally starts accepting that she and Cody are just friends, downgrading Cody from husband to boyfriend to "more than a friend".
During the fire dancing challenge, Heather is able to distract Cody by telling him Sierra rolled into quicksand. Cody panics, drops his guard, and screams that someone needs to help her. This allows Alejandro to push him into the water, eliminating him from the competition. When Cody nearly gets eaten by a shark, Sierra rescues him by rolling into the water and beating the shark back on the beach. In the confessional, Cody admits that he misses Sierra and wishes she was still there in the game when he was fighting with Alejandro in the tiebreaker.
When the old cast appears on a yacht, Sierra is clutching Cody tightly against her chest and grinning, while Cody, who used to be disturbed by this action before, is now smiling at her.
Throughout the episode, Sierra mentions Cody several times despite him not competing. These events occur when she yells "For Cody!" when she jumps off the helicopter and later the cliff and when Sierra picks a key that's shaped like Cody's head. Sierra even compares Gwen and Duncan's relationship to her's and Cody's saying "love is love". During her conversation with Sam, she reveals that she's winning for Cody because the competition is too dangerous for him.
Sierra digs in one spot throughout the challenge, pretending she's looking for Cody to make her search for puzzle pieces easier. This results in her digging a twenty-foot deep hole.someone has broken her phone as it contains her top 500 pictures of Cody in it. When Sam suggests to imagine Cody in her mind, she starts to hallucinate her teammates as having Cody's head. She eventually focuses her hallucinations on Cameron due to him somewhat resembling Cody, and thus starts referring to him either as Cody, or some combination of their names.
Sierra continues to mistake Cameron as Cody and due him to being transfer to the opposite team in the previous epiosde, she become depressed and has to be console by Zoey. Despite the team switch, she still insists to team up with Cameron, whom she now refer to as "Codycam" or any other combinations between him and Cody, to partner with her. When this fail, she try to team up with Duncan instead, with the addition of letting her call him Cody, but this to fail. Sierra later retrieves a mutated egg that hatches into a two-headed rat, who she adopts as her own and names "Cody 1 and Cody 2", greatly disturbing everybody including Chris and Chef.
Sierra continues to care for "Cody 1" and "Cody 2", having made herself their adoptive mother despite their feral behavior though she had trouble doing so as the babies keep on biting her. During the boxing challenge, Sierra is pitted against the twins' real mother much to her horror. Despite her best efforts, she is defeated and the mother take back its children. To make matters worst, Sierra continue to refer Cameron as Cody, taking back what she said about "breaking up with him" before the match, much to his horror. After the Heroes lose the challenge, Sierra is eiliminated by the Villains due to some strong insistence from Cameron, who tells Sierra that she has a real Cody back home who needs her. Although devastated that she has lost, Sierra shouts that she is coming back home to Cody as she is flushed down the Flush of Shame. In the exclusive clip, Sierra ends up at Area 51 and to her delight, several alien pods open, releasing the alien Cody clones. Upon seeing them, Sierra begins to eagerly chase them, thinking the place is heaven.
- Sierra's crush on Cody is similar to Cody's own crush on Gwen:
- Both are obsessed with their crush.
- Both collect a personal belonging(s) of their crush:
- Cody has Gwen's bra.
- Sierra collected Cody's toothbrush, shoes, socks, and underwear.
- Both are jealous of the person whom their crush has feelings for:
- Cody is jealous of Gwen when she dates Trent and later Duncan.
- Sierra is jealous of Cody's crush on Gwen.
- Both follow their crush everywhere to the point where it can be considered stalking.
- Both did something to their crush while they were sleeping:
- Both are "married" to their crush in their mind.
- Both built a replica of their crush.
- Both use themselves as a human shield to protect their crush at one point,
- In their mind, they thought their crush liked them back.
- Both support their crush in the finale.
- Their crushes are still willing to be friends with them despite their obsession.
- In the first season they competed, both left the show with major injuries, requiring them to be in a wheelchair.
- Sierra has a picture of Cody (in the shower, startled and covering himself with the shower curtain) as the wallpaper of her phone.
- They, along with Alejandro, Ezekiel and Heather are the only five contestants from Total Drama World Tour to have been through every single location.
- Both have been stated or shown to have a sugar addiction.
|Interactions with||Alejandro | Gwen | Heather | Sierra|
|Other content||The Drama Brothers|
|Interactions with||Alejandro | Cameron | Chris | Cody | Gwen | Heather|
|Other content||Cody Jr. | Cody 1 and 2 | Sierra's smartphone|