Springtrap is an animatronic, but his real name is William Afton. A man who once was a happy human but lost all of his family members, he ended up alone, he ended up killing off some children at an restaurant of his friend. He then visited the pizzeria one night, destroyed the animatronics that had the souls stuck in there — The souls, wanting to get their revenge, scared him off to some secret room. He noticed the suit of Spring Bonnie there, wore it and felt safe until the springlocks closed.

Cold, evil and heartless

He has lost his parents to the Haois Oni back in his childhood times at the village. He also never truly understood his parents - Especially mother. He's a part Oni and Dragon - Yet he doesn't know of the Oni part, as his mother never told him of that.
He's nice and kind, enjoys music and plays the guitar. He is indeed smart, but not too much as he's a villager. Mao also trainned to be a ninja or a warrior, but he never picked cause his master has passed away to the Oni.