東雲 葵依

Rio's younger sister and Itsuki's classmate. She's got a crush on Itsuki which her sister uses to get her to have sex with him in front of an audience to ease her into life on the island. Because her sister is one of the counselors she's often teased by her and very often is 'volunteered' to have sex with many boys at once until complete exhaustion.

She's also weak at games and climaxes easily which causes her to lose to the other girls putting her into an endless cycle of sex.

She is the protagonist of the side story unlocked when the player first finishes the game.