(shown second from the left)
|Kanji||如月 愛音 (きさらぎ あいね)|
Aine Kisaragi (如月 愛音, Kisaragi Aine) was once a famous idol with his partner, Kei Otonami and the best friend of Reiji Kotobuki. His only known relative is the professor which is also his uncle, who is currently taking care of his body.
From voice to looks he resembles Ai Mikaze exactly. From CGs, the only difference between Aine and Ai is their hairstyle, in which Ai ties his hair up while Aine does not. According to Haruka's dream in the game, Aine wears a necklace around his neck with a blue stone dangling from the chain.
In All Star, it was said that he was a famous idol and got tired of his life because of his hectic and busy schedule. He tried calling Reiji but he was busy at the moment because of his auditions. He thought of suicide and planned on drowning himself in the sea which ended as a failure since he was saved by his uncle (the professor). After his rescue, Aine is now in a coma and his uncle is currently taking care of him. In order to help Aine to wake up from his unconsciousness, his uncle decided to make a robot that looks exactly like him thus creating Ai Mikaze.