Heather

Heather is the main antagonist (or at least the mean girl) of season one. She is the popular Queen Bee in the Screaming Gophers. Heather enjoys talking about her popularity, or her appearance, but truly dislikes her evil little brother Damien (reference to "The Omen"). Heather joined Total Drama Island because she believed that it would her to become a world famous celebrity. She intends to win the competition with dirty tricks, cheating, and sabotaging the other campers.

History
She first forms an alliance with Beth and Lindsay to get to the final three, using Lindsay for stupidity and Beth for her desire to be popular. She first bribes everyone on her team to vote Justin off instead of her. She has an extreme distaste for Gwen and Leshawna, which begins in "Not Quite Famous" after she reads out Gwen's diary, revealing Gwen's crush on Trent. In "X-Treme Torture", she becomes embarrassed after driving a seadoo and while attempting to cut the rope Harold was holding onto, a tree branch snagged her top and Heather remained completely topless. Harold started making a big deal out of it. In the next episode she tries to get Bridgette to join her alliance, but Bridgette says no. An the next episode, Duncan reveals he thinks Heather did something to eliminate Courtney, although Courtney was eliminated because of Harold, not Heather. Eventually Heather gets Izzy to join the alliance with herself and Lindsay. She then spots Gwen and Trent making out. She forms a plan to get one of them voted out, so she gets Trent to turn on Gwen by telling him that Gwen is using him. She makes out with Trent, leaving her angry and devastated. Gwen tells LeShawna about the incident. Infuriated, LeShawna rallies the others to vote Heather off the island. In the end, Heather won invincibility and the group voted out Trent, meaning her plan worked. However, Gwen, Trent and the other campers learned the truth about Heather's plot and Gwen and Trent happily reconciled before he left the island. Heather betrayed Lindsay in "That's Off The Chain!" Although she does make it to the finale three with Gwen and Owen, they gang up on her in the dare challenge when Owen splits his Get Out of a Dare Freebies with Gwen. Stuck without any freebies and Gwen and Owen loaded with them, Heather is forced to face all the dares herself (thus paying for all the harsh things she did to the other campers), she is finally eliminated when she refuses to complete the challenge and is eliminated because of Lindsay's dare to have her head shaved, even though she ends up getting it shaved anyway. In "If You Can't Take The Heat...", Heather threatened that she would cut off Lindsay's hair while she was sleeping if she betrayed her again like what happened to Beth. To say the least karma finally caught up with her. She was set to be voted off several times, but someone else always messed up and got voted off instead. Examples: Justin (convinced team), Cody (got mauled by bear), Beth (put curse on team), Trent (won invincibility and either Trent or her was going to be vote off), Bridgette (invincibility), Lindsay (invincibility), Leshawna (Chris cheated and when the voted off campers said Leshawna's name it counted as a vote against her. Heather returns to the show in the final episode (along with everyone else).  She makes a final attempt to bring down Gwen by fixing some obstacles in Owen's favor.  Though Owen wins, Heather's pride (and somewhat good mood) is lost when LeShawna finally snaps and locks Heather in the Confessional stall (where Owen just had explosive diarrhea after he ate her cupcake which was meant for Gwen).  Not only does Heather not get to see the winner, but she is bathed in Owen's gas (thus really starts to smell). Heather pouts for the rest of the episode, until Chris is dunked in. Gwen tells Heather that she must be happy to see him dunked. Heather slowly smiles (happily) and says "Yeah...a bit." This might be a sign that perhaps Heather has finally made peace with Gwen (and some of the other campers) and will perhaps return to Total Drama Action as either an anti-hero or friend. Though it is possible that she was just happy for the moment and will return as the antagonist of Total Drama Action. In the one hour special (which links TDI with TDA), she actually admits to Harold that she doesn't mean to be so mean and even seems to become close friends with him after he helps her open up. Although she does make a face afterward's, meaning she may have lied and just said this to gain an advantage (as she has been known to do in the past). She may have also really meant it and just thought the speech was lame, although this is probably not the case.

Heather has done many sabotages in an attempt to win the contest. According to Eva, the only reason why Heather won a lot of challenges was because Heather cheated. She stole Eva's Mp3 Player (causing Eva to break out in rage and thus getting eliminated), she read Gwen's diary and reading to all the campers (and show viewers) and even tried (but failed) to sweet talk Chris (as seen in the beginning when she acts sweet towards him). One of Heather's many bad deeds is bringing apart couples (claiming that its just another word for alliance). One of her worst attempts was bringing apart the Gwen and Trent by kissing Trent and breaking Gwen's heart (and trust in Trent). She has also interfered in many other relationships, including Lindsay and Tyler, where she constantly accused Lindsay of betraying her own team and even being abusive towards Tyler. She has also (although unintentionally) interfered with the brief Harold and Leshawna, where she accidentally exposed her breasts to Harold during a mud race. This action was really a problem for her, as Leshawna responded with anger towards her.

Audition tape
In her audition tape, Heather walks out of the shower with a towel and starts talking about how she will not be nervous if she was on the show. She also talks about how pretty she looks, and she adds that if they pick her, she promises high ratings. She then throws off her towel, off-screen.

Video log
On Cartoon Network, Heather's Parent's send her a video log. It starts with her parents dancing with party hats before telling their daughter how much they miss her. All the while a group of movers carry her stuff past them.

Trivia

 * She is one of (if not "the") the most hated campers on the show.
 * Even Eva has more friends than her.
 * She (along with Cody, Geoff, and Trent) have suffered a near death experience.
 * Falling into a pond of jellyfish (Thanks to Lindsay)
 * She is one of the main antagonists of the show, the other being Chris Mclean.
 * Heather is the last female camper to be voted off.
 * She is most likely named after the 1989 movie Heathers.
 * Heather actually has seen reality shows before (as she said in the second episode) and thus she has picked up on some strategies for Total Drama Island.
 * Heather is one of the three characters (the other two being Owen and Gwen) to be featured in all episodes of the show (unless you count Duncan's very brief appearance in "I Triple Dog Dare You").
 * Heather's fingers seem to be long and seemingly sharp, resembling claws (probably not a coincidence).
 * Interestingly when she has her head shaved (both when having a few locks and completely bald), she looks alot like Britney Spears when she shaved her head (this is probably the joke the producers were going for).
 * Heather has strange scream, it starts off as a high pitched scream and then repeats itself in lower pitched sound (it also sounds like she's saying "NO" within the scream).
 * In the final episode, she is completely bald, but when she gets her head shaved, there were several patches of hair left, meaning she shaved the rest (or it was loose and fell out). In the Total Drama Action trailer, she is shown to still be bald. There are however some scenes (such as the film reel and the part when she is getting off the trolley) when she is seen with her regular hair, though they may be goofs. Strangely, her head is shown to be flat. However, in the reunion her head is shown to be round. The cause for this is unknown.
 * It's unknown if she will return as the antagonist or a friend (or anti-hero) in Total Drama Action. Looking at her position, she might return as a friend since at this point everyone knows about her and her back stabbing ways and therefore it would be very difficult for her to set up an alliance with everyone.  In the trailer she is shown growling at someone, although seeing as how everyone in the preview seems to be out for themselves, this might not be unusual.
 * She may actually return in Total Drama Action as a secondary antagonist and it might be Justin who returns as the main antagonist.
 * Despite Heather's dislike of Gwen, she does not wish her dead, as she reacted with extreme fear (like everyone else) when Gwen was cornered by the psycho killer. She also seems perfectly capable of working with Gwen when forced to do so (as seen in Are We There Yeti?).
 * Heather does seem to show some signs of improved compassion throughout the show as she started to apologize to Lindsay and Beth when she was stuck alone in Camp Castaways. This may, though, be her way to win votes and supporters in the final two.
 * She is one of the few people to show some form of nudity, (her boobs) others include Owen,Izzy, Harold, and possibly Cody and Geoff.
 * In a large number of scenes Heather seems to have the smallest eyes of the campers, thus making her look more evil (kinda like villains in anime).
 * Heather opens up to Harold after he points out that she doesn't have any friends due to her meanness and promises Harold to be her friend after the show (not really) in the total drama island special.