These girls.

Elly- A girl of moderate stature with short black-hair that is parted to the sides. Her breasts aren't very large, but aren't very small either. She's new to the team and is unaware of her impending doom. Very peppy and cheerful, your ideal cheerleader. Isabel hates her for that.

Trish- A tall, big breasted brunette who wears her hair in a short ponytail with her bangs framing her face. She is a veteran of the team who is barely able to put up with Isabel. Often coming across as sarcastic, she frequently makes remarks that get her in trouble because she doesn't think her responses through. Not intentionally rude, but won't go out of her way to be nice.

Heather- A dark-haired girl who is only part of the cheer-squad because her mother **** her to be, she is quiet, meek, and easily intimidated. She has earned the moniker; Isabel's Punching Bag, due to her timid nature. Suffers the most from Isabel's tormenting ways.

Christie- The smart girl of the group. Wears glasses outside of practice, earning her Isabel's teasing of her being a nerd. Comes up with most of the routines, but Isabel always takes the credit. She tries to be a proper, well-behaved student, but her patience with Isabel is wearing thin.

Abigail (Abby)- Isabel's right-hand girl/stooge, Abby started out by following Isabel in order to avoid as much of her ire as possible, but has slowly started to join in her fun. Is it too late for her redemption? Or will she go down with Isabel?

And maybe some more ancillary characters.