3x3 Eyes Anime
Yakumo Fuji was an average boy living on his own, until he runs into a girl named Pai. He later finds out that Pai is the last survivor of a mythical Triclop race known as the Sanjiyan Unkara. He also finds out that his father, Professor Fuji, had promised Pai that he would help her become a normal human being. Pai had met Professor Fuji during his expedition in the Himalayas, in his quest to uncover the truth about the Sanjiyans. During the expedition Professor Fuji fell ill and passed away. But before he died he told Pai to find his son who would help her find the Ningen no Zou, the Statue of Humanity, which has the power to turn her into a human.
On the night of their meeting, Yakumo is accidentally killed by Takuhi, a spirit that lives in Pai's walking stick. In order to save Yakumo's life, Pai took Yakumo's soul and merged it with her own. From then on Yakumo is left with the sign of the void upon his forehead and is given immortality. Yakumo now has no choice but to help Pai become human, since it's the only way for him to get his soul back. The Statue of Humanity is also wanted by a mysterious cult who require the Ningen no Zou so that they can raise their dark lord Kwia-Yan-Wang. Yakumo is thrusted into the supernatural world of monsters and demons, in order to help Pai become human and get his life back to normal again.