Ryouko Ninomiya

Outwardly presented as a classmate of Yakumo Kiri, she was in truth a covert operative dispatched by the institute to monitor his so-called "instant death ability." After being transported to another world, she received the granted class of Samurai and was recognized as a candidate for Sage. Fully aware of the terrifying nature of Kiri's power, she maintains absolute obedience toward him. Following the revelation of her true identity, she joined forces with him, and later her concealed role as a ninja also came to light.