Callista is an female not main oc.She is a robot.In her backstory she followed a person named UNKNOWN.Then UNKNOWN noticed her.Unknown started beating her up,Callista standed up for herself but then Unknown threw a robot mask at her and Unknown put it on Callista's face,causing her to transform into a robot,she doesn't trust everyone now bc of that.She has dark purpleish blue hair.She wears a dark purple short dress.Her eyes and mouth are blue. She doesn't know what love is.She has trust issues.