Loca is a member of Alana's (and, later on, Bianca's) posse. She is rough and does the "bad work" for Alana (and then Bianca). She is a tall girl whom nobody likes to mess with. She is also romantically interested in Eddie; she likes to give him arm punches every time she sees him. Loca's role was nothing more than repeating Alana's words comically at her Halloween party, and did the same when Alana vied for the affection of Devon Carter. Loca was with Alana and Muffy when they joined Raven's protest against Principal Lawler's decision to require all students to wear School Uniforms.
During Raven's sleepover, Raven told her and the others that she was psychic, but they thought it was part of her practical joke when it really was not.
She has a huge crush on Eddy