User blog comment:Musical of Corey/Character Ethnicities/@comment-24152851-20140829004413

Jasmine's an indigenous Australian, or an aboriginal Australian. A Native Australian if you like.

Scarlett's British, it's a lot more obvious if you watch her audition video.

Sugar seems to be Texan.

I don't think Mike's African, if you compare him with Cameron and Lightning (who have the same ethnicity) he looks really different, much lighter skin tone and has a head full of hair, while Cam and Light have very flat hair.

Sky might be Canadian, there's a debate whether she's Asian or Cree. If she's Cree then that makes her native Canadian.