Tachi O'Hara (タチ・オハラ?) is a character from the Mobile Suit Gundam: The Origin manga, the Mobile Suit Gundam: The Origin OVA and the Mobile Suit Gundam: The Origin Advent of the Red Comet television series. Once a second lieutenant in the Autonomous Republic of Munzo's defense force, he was in love with Hamon, a singer at Club Eden. Since he was stationed at the docking bay, he cooperated with Hamon to help Casval and the others escape. By the One Year War, he was a lieutenant junior grade in the Principality of Zeon Forces Intelligence Agency. At some personal risk, he evaded the surveillance of the Kycilia Agency to deliver important information to Sayla.