Atsushi Domyoji (道明寺 アツシ, Dōmyōji Atsushi) is Green Hippopotamus (グリーンヒポポタマス, Gurīn Hipopotamasu) of the Doubutsu Sentai Go-Busters. He is the 6th Ranger of the team. Atsushi Domyoji appeared to the Go-Busters in the heat of battle one day, surprising them that he's their sixth member. (In "episode 15" of the "series") He transformed into Green Hippopotamus. It is implied that he began somehow vying for the affections of Yoko and became Hiromu's rival. He was killed in battle more than…