Michio Tsukui, also known by his warrior name Dotsuku, is the representative of the Dog in the twelfth Zodiac War. He is a man appearing to be in his twenties or thirties, with black hair and ears that resemble those of a dog. His sclera are black and his irises are blue. He stands 177 centimeters tall and weighs 53 kilograms, with a birthday of May 5. In his civilian life, Michio Tsukui works as a daycare teacher and is well liked by parents and children, but his true occupation involves secretly locating children with special talents and delivering them to organizations that seek them. His personality is marked by an awareness of his own strength and resourcefulness. He approaches combat with rationality and efficiency, preferring a straightforward and practical style over flashiness. His primary motivation within the tournament is simply to survive and win, though he attempts to form strategic alliances to improve his odds. His role in the story is that of an early competitor who seeks a tactical partnership with Niwatori, the warrior of the Chicken. He agrees to enhance her physical abilities using his own internal toxins, unaware that she is manipulating him. Niwatori betrays and kills him soon after gaining the enhancement, making him one of the first warriors eliminated in the war. His key relationship is therefore with Niwatori, marked by her deception and his misplaced trust. He does not undergo significant character development beyond this brief interaction, as his arc ends with his early death. His notable abilities center on his body's capacity to produce powerful chemical toxins, which he can use to boost his own physical capabilities or to poison enemies. His primary fighting method is biting with his sharp fangs, which are feared for their crushing power and are referred to as Kyoukenbyou. He also possesses sharp claws that serve as natural weapons, and he carries a long knife on his belt, though he refuses to use weapons on principle, relying instead on his own body. His fighting style is built around this close-quarters, biting-focused approach, making him a dangerous opponent in direct confrontation despite his early elimination.