I am Eri black delmo or known as black delmo E. She is a black delmo. Eri has long navy-blue hair. Eri was among the group of Black Delmo which attacked Aika and Gust in the underground parking lot, led by the Black Delmo Leader. As Aika was finishing putting down Misaki, Eri threateningly approached her from behind with unclear intentions. Sadly for the poor Delmo, whatever her plan was, she was not able to make it very far, as the Salvager quickly noticed the move and turned around to face her, stopping the girl right in her tracks. She then easily finished her off by demolishing her stomach with a brutal kick, which immediately had Eri plummeting to the floor unconscious. She was the fourth girl to be subdued in that fight, and also overall in the whole series, since this was the first encounter between Aika and the Delmos. [1]

Afterwards, Eri reappears in Trial 5 during the unsuccessful attempt by the Delmo Corps to eliminate Aika during her vacation at Peroronka Island. In that occasion, she, Naomi and Misaki are the ones in charge of capturing Rion while Valerie distracts Aika. Misaki starts by distracting Rion, asking her the way to the elevator. Then, before Rion could react, Eri and Naomi pulled her at their own hotel room. Later she is seen drinking coffee at a table with Misaki and Rika in the hotel's restaurant, discreetly observing Aika and "Pierre Valimore" sitting at another table nearby.

After some time she is seen again as part of a Delmo group, this time led by Bianca, which 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. She serves Neena Hagen and rudolf Hagen. They are evil and support female supremacy!