Ai (あい) is a Black Delmo member.
Ai has ocher short hair. Alongside her Black Delmo uniform, she is seen in casual clothes including wheat colored long button down dress, white socks and white flat shoes.
Later she is seen during unsuccessful attempt by Delmo Corps to eliminate Aika during her vacation at Peroronka Island. She, Sae and Yuki lured Shuntaro Michikusa to a trap and captured him. After some time Ai is seen again as part of Delmo group led by Bianca which confronted Aika in her hotel room, revealing their true identity. However, Aika managed to escape from them by jumping down from her room's balcony and free Rion Aida and Shuntarou, so Bianca's group began a pursuit for her. After some running, Aika and her friends were forced to fight Delmo in hotel's kitchen. During the fight Ai managed to grab Aika's neck and tried to choke her, but Rion knocked down Ai by hitting her head with frying pan.