Kei Niitoki

Kei Niitoki serves as the disciplinary committee chair at Shinyo Academy. Despite her petite frame often causing others to mistake her for an elementary or middle schooler, she possesses a remarkably mature mindset and an unwavering sense of justice. She is one of the very few individuals privy to the hidden connection between Touka Miyashita and Boogiepop. During the Manticore incident, she demonstrated extraordinary courage as an ordinary person, stepping up to shield Echoes from harm—an act that earned her the rare recognition and respect of Boogiepop itself.