Andy and Fuko

Fuko is a Negator girl with the ability "Bad Luck." If anyone touches her skin, a series of catastrophic misfortunes befalls them, often resulting in death. It was because of this ability that, as a child, she unwittingly caused the deaths of her parents and others. In the title, the "undead" doesn't refer to zombies, but to the character Andy, who is virtually immortal and regenerates any wound. Fuko and Andy become partners: Andy wants to die, and Fuko's ability is one of the few ways to actually harm him. Despite her dark ability, Fuko is kind and wants to live a normal life. She is often seen wearing red gloves (to avoid accidentally touching anyone) and a hat with the inscription "Good Luck"—an ironic touch on her power.

Andi is a Negator with the Undead ability: he is immortal and can regenerate any damage, even regrowth after complete destruction. Because of this, he lives an extremely long time and barely ages. Initially, Andi sought a way to die: his immortality had become a curse for him. He became interested in Fuko Izumo, the main character, because her ability is Misfortune: any contact with her brings catastrophic misfortune to those around her, including death. Andi hoped that it was her power that would finally kill him. But over time, he becomes genuinely attached to Fuko and, instead of using her, decides to protect her. Reckless and brave, kind and honest. Experienced and versatile. Striking appearance. Tall, muscular, with white hair; a metal card on his forehead causes one eye to be half-closed. He has tattoos and scars that do not disappear even with regeneration.