Jyo Akuse is a serious police officer who becomes Bun Black. Driven by a sincere dream of becoming a hero, he brings discipline, courage, and a strong sense of justice to the Boonboomgers.

Jyo's formal attitude sometimes clashes with the team's more unconventional style, but his determination makes him a dependable ally. After witnessing the Boonboomgers in action, he chooses to fight beside them and protect the city from Hashiriyan threats.