Kuroma

Kuroma (クロマ) is the anthropomorphic note that follows Remi Otogiri in Groove On Fight. It is a demon that was created by her mother to be her bodyguard.

Kuroma appears constantly with Remi in battle and is utilized as something of a weapon. It has the ability to metamorph, usually in the form of a blade weapon, which it will use to attack opponents with devastating results.