A demon weapon partnered with [Black Star](https://anilist.co/character/8464/BlackStar) hailing from the Nakatsukasa Clan, a special weapons clan who are direct descendants of demon weapons created by the mother of magic weapons, Arachne Gorgon. Having inherited the unique Multi-Form Ability of her clan, she joined the DWMA to stop her brother from becoming a kishin, becoming fast friends with [Black Star](https://anilist.co/character/8464/BlackStar) in the process.
Tsubaki is known to be very patient and forgiving, with a polite and gentle personality that often leads to her helping or comforting her friends when they are in need.
