symbol of their contract, put his own blood into Luka's brand. The demon king's blood made the brand on Luka's arm glow red, and it caused Luka a great deal of pain during the process. Years later, Luka is still haunted by the memory and feels physically ill when recalling it. Because it was a blood seal, if Luka should ever betray the demon king, he would die. Luka explains to the male incarnation of Yuki that since he made a new contract, the previous contract with the demon king of duras no longer applied, allowing Luka to live. Zweilt Guardian The bearer of Kami no Mimi, God's Ears. A high school boy who appears to Yuki along with his sister at the start of the story. He is one of the Zweilt Guardians and also part of the Giou Clan, making him and his sister Yuki's distant relatives. His powers seem to be the ability to speak with animals, sense people, 'hear' the voices of people's hearts, 'hear' the memories of an object, extraordinary hearing, project his voice/thoughts and the ability to draw a gun from his ring during a battle. The name of his gun is Knell (Funeral Bell). For some reason he always has snacks with him. He seems to be extremely close with his older sister Toko, whom he calls Toko-chan and says he will always protect. He was severely injured by Reiga in Episode Ten, but Yuki managed to heal him with his powerful yellow light combined with his empathic abilities. Tsukumo's older sister, Yuki's relative and also a Zweilt guardian. Her ring produces a huge sword called Eon (Eternity). She attends the same high school as her brother, where their closeness make all the girls jealous of her. She is very fond of Yuki (whom she calls Yuki-chan), telling him that "He is a person who is too kind for his own good" and asking him to refer to her in a more close way (Tōko-chan) instead of calling her Tōko-san. She is the guardian that most interacts with Luka, and sometimes blushes when she is near him, because in her past life, Tōko had a lover who resembled Luka. The bearer of Kami no Koe, God's Voice. Hotsuma is one of the Zweilt guardians, and he has an uncertain control over his gift, which usually manifests as fire. He is short tempered and