A perverse person with a cold demeanor, Tsubaki is a quiet first-year student, 15 years old, who is somewhat philosophical yet she isn't too much serious. Part of the group TriEDGE, she is not good at showing her emotions, and often has a curt attitude, but she does care deep down for her friends. While she can came off as snobbish and crack rude jokes, she has many secret admirers that admire her chilling gaze. Tsubaki is part of the group TRiEDGE, alongside Rio Takase and Riku Yuuki.