Kaga Sumire is a petite, silver-haired high-schooler who is a part of the school's Discipline Committee. She usually speaks in a calm and beautiful voice, but her voice can suddenly become loud when she gets excited. Despite her cute appearance, she's rather strict with rule-breakers and takes her role in the Discipline Committee very seriously, upholding morals and the school's integrity. People fear her wrath when she seriously gets angry, and depict her as a different person when enraged.