From Touhou Project: Ruukoto (るーこと) is the robot maid belonging to Reimu Hakurei. Although she is enthusiastic about doing chores, she isn't very good at them. She is also nuclear powered. She wears a light-blue and white maid uniform with a red bow and a yellow radiation warning symbol on her back. She has light green hair.
She's been forgotten in a shed for a long time but when she got out she started living on her own, even as a maid she's the dominant one to one's she kidnaps.