Gai Kurenai (クレナイ・ガイ Kurenai Gai), formerly known simply as Gai (ガイ, Gai), is the human alter-ego of Ultraman Orb, and the main protagonist of the Ultraman Orb TV series, and the literature Ultraman Orb Chronicle. Gai has wandered around the Earth for a long time on a mission to stop Jugglus Juggler from resurrecting the Lord Monsters. He uses the Orb Ring to transform by combining and using the powers of previous Ultramen. He also uses the Orbcalibur to transform to Orb Origin.