Kurumu Kurono

It is said that should Tsukune not pledge his love for Kurumu, she will die, as the source of life is love for a succubus, coming from their destined ones.

As a succubus, Kurumu has the ability in to easily seduce men, which she takes great pride in. She is well liked by most of the boys in her school, but fell in love with Tsukune when he saved her from an angry Moka. Kurumu initially acts cold and arrogant to attract Tsukune, and later tells him that he is her one true love and will try to make him love her without her succubus power.

Since Kurumu is beautiful and has succubus powers (she's confident in both), she often tries to either win Tsukune over with her two assets, or she teases her "competitors" for Tsukune about how she is much more beautiful than them. However, she doesn't tease Moka as meanly as the rest, but does push her aside when she is with Tsukune.

When Kokoa suggests that Kurumu use her powers to win Tsukune, Kurumu states that she vowed to never use the Charm to win him. WhenKokoa asks her why, Kurumu said, "You'll understand, when you fall in love." To which Kokoa said she was unusually pure of heart compared to other Succubi, prompting Kurumu to blush heavily, suggesting that when someone notes her pure hearted behavior, she's very shy of it as it would be unbecoming of a Succubus.