ニナ・クリオーネ

"Fufufu, that's right. If this was a video game, then she'd be the last boss."

The principal and chairwoman of Ginran Academy, who is adored by the students. She attended Arianrhod Girls' Academy in Europe. During her time as a student there, she was named a diva. Nina is the creator of "Cadenza," a new kind of fencing using stereoscopic images, along with various equipment and facilities to accommodate it.