Shin

心

Shin's mask is shaped like a human heart, though he typically wears it backwards, with the front facing rearward and two eye holes cut into the back. Without the mask, he is blond with blue eyes and wears glasses. He is usually dressed in a suit with an untucked white shirt and sneakers. His weapon of choice is a hammer, along with his magic smoke, which allows him to dismember and dissect people without causing physical death.
Despite being a hitman, Shin believes in fair fighting and refuses to use his magic abilities on people who cannot use magic, resorting to his hammer instead.
In contrast to Shin's controlled and content nature, he is very bloodthirsty for competition. As shown in the first chapter, he gets thrilled when En assigns him and Noi the task of killing Kaiman and Nikaido.