The following information was taken from the Hester Ulrich page on the Scream Queens Wiki.

Hester Ulrich, also known as Chanel #6, is a main character on Scream Queens. She is a pledge of the Kappa Kappa Tau sorority who pretended to suffer from scoliosis and becomes a member of The Chanels in Chainsaw. In The Final Girl(s) it is revealed that she is the female bathtub baby, Boone Clemens' twin sister, and the final Red Devil. She was the brains of the Red Devil team, while Boone was the brawn.

She is portrayed by Lea Michele.