Yusuke Urameshi

Yusuke Urameshi (浦飯幽助, Urameshi Yūsuke) is known to be a stereotypical bad seed; having a spotty attendance record, doing poorly in class, and picking fights with many other students. He also smokes and drinks in the manga. He dies after saving a small child from being struck by a car, which is something the guardians of the afterlife did not predict. Koenma allows Botan to guide Yusuke and allows him to come back to life after completing an ordeal to show that he is truly a good person. He is then forced to become a Spirit Detective who protects the human race from demons. He is voiced by Nozomu Sasaki in Japanese media and Justin Cook in the English dub. Rik Nagel voices the character in YuYu Hakusho, The Movie: Poltergeist Report.

Yusuke's most common attack is the Spirit Gun (霊丸, Reigan, lit. Spirit Sphere), spirit energy concentrated into his right index finger and released it as a projectile. He develops variations as he develops and strengthens it. He is a Mazoku, or a descendant of the Amazaku demons. Raizen made it so that when the stars reach a certain alignment, and his descendant is worthy of awakening, they would transform.

Source: Wikipedia