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 (Source: Official Site, edited)
Voice Actors
Tatsuhisa Suzuki
Japanese
Alexandre Coadour
French
Robbie Daymond
English
Jose Antonio Macias
Spanish
Martin Bonvicini
German
Bruno Sangregório
Portuguese (BR)
Carlos Hernández
Spanish