Kanna Utsugi

Kanna Utsugi (宇津木 環那) is a tower witch. She is transferred with other members of KMM Gang after the second loss of Tanpopo Kuraishi to Honoka Takamiya's class. She is a underling of Medusa. Medusa is the youngest sister of the Gorgon Sisters.

Chronology
She transfers along with her other four comrades in to Honoka Takamiya's class. The next day, the gets attacked by Ayaka Kagari and defeated by her. After some days she and her gangs again attacks Honoka and Ayaka and wiped out in an instant by Ayaka.

Powers and Abilities
Kanna's powers are still unknown, the book she carries is book of demon called "Black Vice" (ブラックヴァイス) that contains many grimoires.

This suggests the capability to apply curses to people she doesn't like. This power has not been exihibited up to Episode 8 of Witch Craft Works anime.

Mostly, we see her in a supporting role, as an ordinary member of the "KMM Team".