Koichi Kimura (木村 輝一 Kimura Kōichi?) is one of the protagonists in the Digimon anime series Digimon Frontier. He is one of the "DigiDestined", children who were chosen to receive the ability to transform into Digimon in order to save the Digital World, and he is also known as one of the Legendary Warriors, inheritors of the Spirits of the Ten Legendary Warriors. He was originally brainwashed by the fallen Cherubimon to serve as one of his evil Warriors. Koichi's first appearance is that of the antagonist Duskmon, wielder of the Spirits of Darkness and one of Cherubimon's servants. Once freed of this control, he fights alongside the DigiDestined. He is Koji Minamoto's older twin brother, having been separated by their divorced parents at a young enough age that they grew up unaware of each other.