Chica has a gapping mouth and is no stranger to being aggressive, she's just as aggressive as bonnie and will get creative with her kills, wither by biting or electrocution. She stalks the hallways with the toys and her group, and just like some of the others she takes the vents to the offices. Chica's voice is pretty scratchy as her jaw got spit apart, only her endo mouth is in tact. 
(FNAF UCN Voice)