He is possessed by the rooster of the Chinese Zodiac. Whenever a Sohma is hugged by the opposite gender or his or her body comes under a great deal of stress, they transform into one of the twelve zodiac animals. Kureno is a quiet, obedient man.
Who doesn't love birds? Complete monsters, that's who! So if you're not a complete monster, you might be interested in looking at this writer's list of some of the best manga and anime birds, right? Time to bird up!