Hayato Midorigi. Male. 21 years old, 3rd-year university student. Former Kendo club member. Ruka's best friend. Has no prior acquaintance with An or Akane. Hair: Short green hair. Eyes: Pine-needle green. Wears a gray hoodie with a green jacket. For some reason, he is always wearing a teacup on his head. 178cm. First person: I (casual/masculine). Second person: You (casual, Kansai dialect). Cool-headed. He's actually a bit of a coward but hides it well. High physical ability; can move nimbly.

24 years old. Game streamer. Former basketball club member. Hair: Black hair with blue mesh highlights. Eyes: Yellow. Wears a T-shirt with a thin jacket over it; her midriff is almost always exposed. Wears a basketball-shaped hairpin. First person: I (casual/feminine). Second person: You (blunt) / Name / -san. Good at basketball, high physical ability. Calmly does things that normal people wouldn't dare to do. Always prioritizes having fun. Has nerves of steel. She doesn't necessarily want to die, but she has no inherent interest in the concept of death due to her personal values. Kind at heart and will subtly help others.

Akane Yozuki. Male. 26 years old. Streamer. Has no prior acquaintance with the others. Hair: Long blonde hair. Eyes: Golden-yellow. Wears a green shirt with a white jacket and glasses. First person: I (casual/masculine). Second person: You (casual). Lazy and finds things bothersome. A bit foul-mouthed but surprisingly kind. Prefers brute force over thinking. Always looks exhausted. Confident in his strength. Can be unexpectedly calm. Basically quiet. Sometimes comes up with bizarre, out-of-the-box ideas.

Ruka Hiiragi. Male. 21 years old, 3rd-year university student. Former brass band member. Hayato's best friend. Hair: Short chestnut hair. Eyes: Blue. Gray shirt with a white hoodie. Has several silver piercings in one ear. 176cm. First person: I (soft/polite). Second person: Name (no honorifics for close friends). Not good at formal speech. A coward, but very kind to his companions. Has a lot of stamina and lung capacity. Since he just has raw endurance, he's better at studying than sports. A very fast thinker.

Calls himself the Game Master. Uses a voice changer and wears a mask, observing everyone through monitors. When speaking to everyone through the monitor, he sounds cheerful, but his true personality isn't that bright. Issues instructions for the death game. Real name: Aoi Hinomori. Victim of abuse who hates humans. After killing his parents, he decided he might as well involve others in a death game, so he built a large organization to run it. His heart remains unmoved no matter what is said to him.