- Hiroshi Miwa (三輪 寛, Miwa Hiroshi)
- Voiced by: Yūta Kasuya (Drama CD), Tsubasa Yonaga (anime) (Japanese), Greg Ayres (English)
Hiroshi is Akuto's self-described minion much to Akuto's dismay. A boy of small stature, he is frequently and savagely bullied by other students, and sees Akuto as his protector.
His desire to become Akuto's servant began when Akuto gave a speech in class that touched him, although its debatably anarchistic climax terrified the rest of the class. Despite looking up to Akuto, he believes him to actually be evil and often misinterprets his intentions, giving counterproductive advice as a result.
Later on in the series, he is revealed to have been predicted by the Yatagarasu to become a hero in the future, and so he acquires the AI unit D13 (Voiced by: Kaori Akashi) and uses it to transform into the legendary hero known as Brave (ブレイブ, Bureibu). As Brave, he has access to numerous weapons such as lasers, energy blades, and plasma guns. He keeps his identity as Brave a secret from the others. He is also a big fan of the idol Yuri Hoshino, who he later saves and becomes acquainted with.
In the anime, Hiroshi immediately latches onto Akuto as a "big brother" upon meeting him in class while in the manga, Hiroshi only makes the assocation after Akuto saved him from bullies.