Powers and AbilitiesEdit
Yumi was never shown to use her powers during desperate situations, meaning that the demon she took control of was probably very weak.
Yumi was a innocent girl who seemed to get on well with Mico, but was still often used as bait by others to lure demons.
She is first seen being chased down a dark alleyway by a demon possessed man, she runs into a dead end and is cornered and the man transforms into the demon Zuboo. Zuboo tries to grab the girl and knocks off her hat revealing the demon underneath revealing Yumi is a Devilman. Before Zuboo can do any more damage however. The Devilman Mico splashes him with her acid melting the demon, but Zuboo was not only transforming to play possum and slams Mico against a wall were and knock Yumi to the ground. Luckily however, Akira finds them and battles with Zuboo where he quickly kills the demon.
Later after Akira had found the dead bodies of Tare and Miki Makimura, she finds Mico and Akira in a warehouse having just got back from a scouting mission saying that she overheard that the Demon leader Saylos was intending to attack them. Almost immediately after saying this, Saylos and his gang of demons crash through the roof and try to blackmail Akira into joining him. Instead, Akira distraught over the death of his beloved Miki unleashes Amon the demon Akira had originally gained his powers from. Amon proceeds to destroy the warehouse, in the rubble he finds Yumi out cold on the floor. He picks her up and waits for her to open her eyes before he bites her in half, ending her short life.