Flame of Recca

Source taken from AniDB.net/Wikipedia.org

This anime is kind of old but I guarantee this anime is great.

Flame of Recca (Rekka no Honō?) is a manga series by Nobuyuki Anzai, which was adapted into an anime series spanning forty-two episodes by Studio Pierrot. The manga was originally serialized in Shōnen Sunday starting October 18, 1995, with the last chapter published April 18, 2002, and has been compiled into 33 tankōbon volumes by Shogakukan. Both the anime and manga were licensed for North American distribution in English by Viz Media. The series has also been adapted into two video games; Flame of Recca for the Game Boy Advance and Flame of Recca Final Burning for the Playstation 2.

Recca Hanabishi is a ninja, but is nearly killed in an accident. However, a girl named Yanagi heals him with her powers. Later, the two are tracked down by a woman who attacks them. She tells Recca to ignite his flame, but he is clueless. Just as she hurts Yanagi, Recca releases a powerful flame upon the woman.