Spark

Spark was created as a partner to Rose, designed after a popular character in a different well-known franchise, he may have been created without proper licensing but surely no advertising will mean that the similarities would never get noticed... Hopefully. While he was active in a location, he never got discovered, likely because it was before restaurants really got around overseas (and the Freddy's Locations weren't super known outside of America), so he got very lucky. Spark seems generally quite happy and upbeat, though he follows Rose's lead on being cruel to Charlie, and if it weren't for the fact that children liked him for his design she probably would have destroyed him by now.

He follows Rose a lot, but does have his own pathing that he can follow. Sometimes. . . Nahh, not unless he's busy performing or something.