Kuwabara Kazuma

Kazuma Kuwabara is a classmate of Yusuke's at Sarayashiki Junior High School. Despite his unusual affinity for kittens, he is the second toughest delinquent at the school, constantly picking fights with Yusuke to prove himself stronger, but never succeeding. Eventually, Kuwabara's feelings of anger toward Yusuke become feelings of respect. Although he loves fighting, Kuwabara would never steal or extort money. Kuwabara has a very advanced sixth sense and is highly aware of the supernatural. Kuwabara ends up assisting in most of Yusuke's cases, having gained the ability to form a sword out of his own aura called the Aura Sword (霊剣, Reiken, "Spirit Sword" in the English anime) during the competition to become Genkai's pupil.