I am Ayumi or known as Black delmo D. is a Black Delmo member. Ayumi has short light brown hair. Alongside her Black Delmo uniform. Ayumi was among the group of Black Delmo which attacked Aika and Gust in the underground parking lot, led by the Black Delmo Leader. She appears in the very beginning together with Black Delmo K, Rika and Black Delmo J. She tried to attack Gust but he easily managed to evade her and throw her to the ground head first in the process. Later she was knocked down either by Aika or Gust, and is seen landing unconscious on top of the car near Black Delmo Leader.After the fight ends the Blues Delmos pick up the remaining Black Delmos, Neena Hagen decide to punished her Black Delmos and order her White Delmos to beat them for failing her. [1]

Afterwards, Ayumi reappears in Trial 5 during the unsuccessful attempt by the Delmo Corps to eliminate Aika during her vacation at Peroronka Island. She is seen again as part of a Delmo group, this time led by Bianca, which she confronts Aika in her hotel room, revealing their true identity. However, Aika manages to escape from them by jumping down from her room's balcony, freeing Rion Aida and Shuntaro Michikusa in the process, so Bianca's group begins a pursuit. After some running, Aika and her friends are forced to fight the Delmo in the hotel's kitchen, making quick work of all of them. Since Aika's group seemed to be running away, Ayumi who was leading the chasing Delmos, Ayumi saw Aika's group running into the hotel kitchen, she rushed into the dark room after them, confident she and her group had the upper hand. It was only too late when she realized it was not actually so and she had in fact walked into a trap, just as Aika hit her square in the face with a demolishing blow which stops her right where she stands and sends her unceremoniously plummeting to the ground, as she shrieks in pain, her ass lands on the ground hitting her head down and her body skid straight into the kitchen revealing her panties. Boss is Neena Hagen and rudolf Hagen.