[Tsubaki Nakatsukasa (中務 椿, Nakatsukasa Tsubaki), the Demon Weapon, is Black☆Star's partner. She can change into multiple ninja weapons, including the chain scythe/kusarigama, shuriken, smoke bomb, and eventually the uncanny sword. Like her brother, she is a member of the Nakatsukasa clan.]  

She is a gentle, caring, and supportive character. Known for her forgiving personality, her ability to mediate between her friends, and her willingness to help even when she doesn't know how.