Kotetsu Katsura

Kotetsu Katsura (倉石 たんぽぽ) is a tower witch and an underling of Medusa. She is transferred with other tower witches after the second loss of Tanpopo Kuraishi, to Honoka Takamiya's class.

Chronology
She transfers, along with her other four comrades, in to Honoka Takamiya's class. The very next day, Kotetsu's Gang gets attacked, by Ayaka Kagari and defeated by her (as a response to her own attack). After some days, she and her gang, again attacks Honoka and Ayaka and were wiped out in an instant by Ayaka.