A second-year female student at Seiai Academy and the team leader. Her Quirk is "IQ," which doubles her IQ while she drinks tea and keeps her eyes closed. The increase depends on the quality of the tea; her base IQ is 150. Her uniform consists of a white military-style beret, white flared-cuff gloves with a texture between enamel and satin, a white military coat dress with double buttons, gold piping, a large red ribbon, and a swallowtail hem. Saiko has long light-blue hair and wears a monocle over her left eye. She finds pleasure in cornering opponents with meticulously planned strategies. She speaks in a formal, haughty tone (using "deshite-yo" and "nasai"), though her internal monologue is casual.

Female students from Seiai Academy led by Saiko, all wearing uniform caps and outfits. Utsushiko Puroji: Quirk is "Projection." Her eyes act as projectors, allowing her to display opponent information as holograms. Yoshi Baana: Wears mechanical-looking gloves; her Quirk allows her to weld or melt objects like a burner from holes in her fingertips. She wears a welding mask during use. Hanaten Reiki: Wears large iron-like gloves and emits cold air from devices on her arms. Wears goggles and an iron mask. Tobashi Sadame: Has slingshot parts attached to her gloves or hands. It's unclear if this is her Quirk, but she primarily snipes from high vantage points.