Subaru Hidaka  

Mr. Pleiades, 日高 昴

A student who is currently in their second year at the same school as Kaito and Akiho. He won first place in the Robo-One championship several years ago, which led to Akiho trying to persuade him to join the robotics club. However, he declined because his father had made him promise that he would stop playing with robots during high school and become a fisherman after graduation. Later on, Kaito convinced him to join the club by using Mr. Pleiades' identity as blackmail.