Magatsuhi

Mahiru Hyūga's Kakashi. A doll with a red color, it has the appearance of a fin being thinner at the bottom than the top, it has two long chain-like arms and multiple holes in it's body to shoot it's barrier strings.

Abilities
The most prominent ability of this Kakashi is to be able to form a barrier the prevents a Kakashi's Seki to control it by preventing the Seki's thought from reaching the Kakashi. The first time this ability was used was around 7-8 years before the main events in the anime, where Kyohei, Aki and Mahiru discovered an abandoned cave wherein lies a monster Kakashi that devours the minds of other people. This ability's power may not be absolute as some Kakashi can resist its power, as evidenced by the first time it is used.

Other abilities Magatsuhi is known to have is the ability to become invisible and can fly. It also sings a song when being controlled by its Seki.