Ko Tensho (黄天祥 Kō Tenshō, Huang Tian-Xiang) (Voiced by: Sachi Matsumoto)
Ko Hiko's fourth and youngest son, a Tennendoshi who inherited his father's strengths. He views Nataku as a friend and older brother, perhaps ignorant of the destructive tendencies Nataku possesses. After his mother, aunt, father and brother die, Tensho closed himself off, until Nataku told him that he would take care of Tensho, and that he would never lose or die. At first, Tensho used a spear for a weapon, but after his father's death, switched to using Hito.