Kotetsu Katsura

She is a tower witch. She is transfered with other tower witches after the second loss of Tanpopo Kuraishi to Honoka Takamiya's class. She is a underling of Medusa, First sistor of Gorgion Sisters.

Chronology
She transfers along with her other four comrades in to Honoka Takamiya's class.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.