Hideyasu Jonouchi (城乃内 秀保, Jōnouchi Hideyasu) is the former leader of Team Invitto who transforms into Kamen Rider Gridon (仮面ライダーグリドン, Kamen Raidā Guridon). He later temporarily transformed into a Kurokage Trooper (黒影クロカゲトルーパー, Kurokage Torūpā, lit. "Black Shadow Trooper").