I was thinking of this during the day and it transitioned into my dreams so here are the choir groups and bios.

Soprano- male, short blond hair, 16, popular, loves to sing, is highly feminine, doesn't like to fight but will if he has too, isn't good at academics.
Bio- He lives alone but is supported by his rich parents and goes to Aki private high school.

Alto- male, short white hair, 17, anti- social, loves to mess with other people's hearts, is flirty but also cold hearted, doesn't like to be around people but is forced to, isn't much of a socialist.
Bio- He was home schooled before then his parents thought it was best if he was around others his age so he now attends Aki private high school.

Tenor- male, messy red hair, 17, is a delinquent, loves to cause trouble, is cold and rude...but is a sweetheart, and protective, doesn't like to listen to adults or learn, isn't good at much but is really smart.
Bio- His parents kicked him out of their home when they found out he was doing illigal stuff and now he dorms at the school thanks to the entrance exams that he aced.

Bass- male, green hair cut short, wears glasses, 18, is the schools basketball teams captain and he plays other sports, loves to be in the gym or on the field, is cool, confident, and a bit cocky at times, he doesn't like the arts(thinks their a waste of time), he isn't the best in academic but is passing.
Bio- His parents were both sports lovers, so they raised their son that way, now he plays all the sports(except female sports) and keeps his grades up so he can play.