Mikio Shirato

白都 樹生

Mikio Shirato is Yukiko's older brother. Mikio Shirato challenged Joe wearing a set of Ace AI-powered gear that he designed himself in the first season. Second season [Spoiler] He decided to retire after being defeated by Joe. Since then, he has been teaching at a university as a scientist while continuing his research and development activities. [/Spoiler] (Source: Official Site, edited)