Kai Kurigasa is a 1st year student at Tenbi Academy and a supporting character of the Maken-Ki! series. Kai has a large crush on Azuki Shinatsu and challenged her to an official duel in the hopes of making her his girlfriend. Even though he lost, Kai's goal hasn't changed and he actively pursues a relationship with Azuki by trying to impress her.
Kai's Maken, known as Full Metal allows him to harden parts of his body and make them as dense as steel.
He is a tall, muscular freshman, with brown hair and a signature visor (hat). After the events of the Summer Camp arc, he no longer wears the visor.
Honorable and always fulfilling the promises he makes, many of the guys Tenbi consider him a model of "manliness".
Fullmetal - Kai's maken allows him to make his body like steel, giving him advanced endurance and strength
Casts - Kai has become one of the few people in the world capable of using casts, having learnt from Takeru's father Takeshi.