Mai Taniyama

Mai Taniyama is a first-year high school student who temporarily assists SPR to repay a debt after accidentally injuring Naru's regular assistant, Lin, and breaking a camera during an investigation at her school. After the first case concludes, she is offered a regular part-time position at SPR, acting as both an office and on-case assistant. She refers to Shibuya as Naru due to his narcissistic nature.