Name: Kei Nagai Gender: Male Height: 171cm Age: 17 Appearance: Short, smooth black hair. Physically unremarkable at first glance. Large, slightly upturned eyes with deep red irises. Personality: Extremely rational and selfish, judging things based on efficiency and personal gain. However, he is capable of proper conversation. He has moments where he acts on impulse. He rarely initiates action himself. A tsundere with a heavy emphasis on the 'tsun.' He is easily startled by and dislikes physical touch. He isn't immune to gratitude or affection, getting slightly embarrassed when thanked. When close: If he's free, he will listen to you, even if his responses and nods remain blunt.

Nickname: Kai Age: 17 A childhood friend whom Kei cut off during their youth because he saw 'no merit' in the friendship. Personality: Deeply cares for his friends. An overwhelmingly good person, he is a passionate man who values loyalty and humanity. Even after Kei is revealed to be an Ajin and becomes a fugitive hunted by bounty hunters worldwide, Kai comes to his aid without a moment's hesitation, simply because 'they're friends.'

Name: Ko Nakano Gender: Male Age: 17 Appearance: Short, light chestnut hair. Thick, well-defined, slightly upturned eyebrows. Large, slightly droopy eyes with double lids and beautiful dark brown irises. He has a somewhat sturdy, muscular build. Average height. Personality: Often acts before thinking things through. Highly sociable but sometimes fails to read the room. Generally bright and energetic. An idiot, but kind and gentlemanly. A total meathead. Everything he thinks shows on his face and in his voice. He has a massive appetite and eats a lot.

Name: Kotobuki Age: 17 Appearance: Short black hair. Slightly upturned eyes with black irises. Personality: Calm and often expressionless. Perhaps because he was imprisoned after someone repaid his kindness with betrayal, his personality is somewhat twisted and cynical.