Kurumu Kurono (黒乃 胡夢, Kurono Kurumu) is a Succubus and the one most beautiful girl at Yōkai Academy, but wants to be the most precious girl at school which was taken by Moka. One of Kurumu's goals is to be the most beautiful girl in Yokai academy, but when Moka came Kurumu's wish was taken. So one of her other goals was to take Tskune from Moka. To make Tsukune fall in love with her. Despite her numerous sexual advances towards Tsukune, in actuality Kurumu is a very innocent character and genuinely yearns for Tsukune's love.
It is said that should Tsukune not pledge his love for Kurumu, she will die, as the source of life and love for a succubus, comes from their destined ones.
Kurumu has light ocean blue hair, tied back with a purple ribbon with a star on it. She has deep purple eyes and thick eyelashes. She wears a different uniform to the other female students. She wears a plain long - sleeved white shirt with a red bow tie, and a pale yellow oker coloured vest with the green short skirt. She wears knee socks rolled down a bit and shoes.
As a succubus, Kurumu has excellent abilities in seduction and takes great pride in it. She is well liked by boys in her school, but fell in love with Tsukune when he saved her from Moka, as she had been trying to make Moka jealous by stealing him. Kurumu initially acted cold and arrogant, only interested in repopulating the succubi and controlling boys, but in truth she is very kind-hearted and grows to become one of their best friends. Even after warming up to Tsukune and Moka, Kurumu retains her crush on Tsukune and flirtatious characteristics, constantly trying to seduce the object of her affections.
As a Succubus, Kurumu has a wide array of powers and abilities.
Flight: As a Succubus, Kurumu has the natural ability of flight.
Enhanced Strength: Kurumu has notable strength, being able to slice trees in half with her claws and carry multiple people at once.
Allure: Being a succubus, Kurumu possesses powers of Allure, which she can use to hypnotize males. This technique, however, only seems to last a few minutes.
Illusions: Later on, Kurumu displays further powers, employing the use of strong illusions to wrap vines around a slug Yōkai, Nagare Kano, who was blackmailing her in order to take ecchi pictures of her, defeating him completely. Despite being sealed, Inner Moka was stunned that Kurumu displayed such power because the use of illusions are usually displayed by the higher ranked succubi.
Unlike the manga, Kurumu's anime incarnation does not display any illusion or reality-bending abilities what-so-ever.
In the second manga serialization, she is learning basic witchcraft to help with the strength of her illusions along with Mizore. Like Mizore, she was also trained by Ginei during the summer break in hand-to-hand combat in an effort for the two to become strong enough to overcome Inner Moka in a fight.
Enhanced Allure: As a Succubus who can use Illusions, Kurumu has displayed the ability to affect an entire crowd of males with her Allure. Unlike her original Allure, this display hypnotized Tsukune for several hours.
Mind Entering: Recently, she has shown her ability to travel into people's minds via her tail. Its revealed that she can't stay in the dream too long or it will exhaust her body. Later, she shows that she can enter a person's mind with a kiss, like she did with Tskune to bring his soul back.
Barrier Entering: When Tohou Fuhai said he was going to kill Tsukune, Kurumu managed to force herself through his barrier. This is especially interesting as that barrier was set to kill anything that tried to get through it.
During the summer break, she and Mizore have come up with at least three joint attacks, though, based on White and Black Duet, Number 13: Last Waltz, they could've developed 13.
White and Black Duet, Number 3: After Kurumu has transformed into her true form, she will pick up Mizore before twirling around. As this happens, Mizore seems to release a barrage of ice shards from her Ice Claws.
White and Black Duet, Number 9: After appearing behind a target, Kurumu and Mizore will both slice him/her with their claws and launch the target into the air. Based on what Mizore said, they had waited a long time to use this against Inner Moka.
White and Black Duet, Number 13: Last Waltz: After clasping hands with Kurumu, ice will begin to form in the air above a target. It quickly forms into a good-sized piece of sharpened ice that descends towards a target. The true power of this technique is not known, though she and Kurumu had to jump away to avoid the shockwave that it caused.