Ajin: Demi-Human Elenco dei riempitivi

Sato is another Ajin pursuing a violent agenda of revenge against the humanity that persecutes his kind, whose charismatic ruthlessness makes him one of the most dangerous figures Kei encounters.

Kou Nakano is Kei's childhood friend who helps him evade capture after he is revealed to be an Ajin, risking his own safety to support Kei through his ordeal.

Kei Nagai discovers he is an Ajin after a truck accident should have killed him, forced to go on the run from a government eager to experiment on Ajin while deciding what kind of person he wants to be.

Eriko Nagai is Kei's younger sister, whose safety becomes a source of constant worry for Kei as the government and other Ajin close in around his family.