Bianca

From That's So Raven wiki

Bianca, played by Erica Rivera

Bianca took over as Raven's main rival after Alana was sent to military school. She apparently "was so bad she got kicked out of military school". She only appeared in 2 episodes in Season 3 (Boyz 'N Commotion and Gettin' Outta Dodge), and disappeared thereafter, being replaced by Muffy.