Ticket

-story is still in progress but I'll give you an idea-

Ticket once worked as a repairman for a local arcade. Besides fixing the games, he also tried making countless prototype robots in his spare time. While working, he was accidentally killed.

His spirit somehow found its way into the machine he had been working on. When he gained consciousness in his new body, he had forgotten everything of his past self. He stayed hidden in the arcade for months, only coming out at night. He stole bits and pieces from games to form a better, more stable body. The tiny arcade soon closed down after their games kept mysteriously being taken apart with no money and no one to fix them. 

Ticket now calls the arcade his home and doesn't dare go outside as he's afraid of what might be out there.