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. She is obsessed with the boy band "Boyz in Motion" and also loves s'mores, as seen in the episode "Shake, Rattle, and Rae". She even shows compassion (briefly) for Raven in the season 3 episode "Boyz 'N Commotion".
Loca is shown to be nicer than Muffy or Bianca in personality, and sort of became friends with Raven.