E-class hunter.
He was called "humanity's weakest weapon," but after the double dungeon incident, he gained the power of the "System."
By clearing missions in windows that only he can see, he can improve his skills and power, allowing him to grow.

D-class hunter.
The second son of the president of Morobishi Construction Company.
He aims to become the Guild Master of the Morobishi Construction Guild. He
plans to team up with Shun in order to obtain the Guild Master License necessary to be recognized by his father and to obtain the appropriate raid record.

Shun's younger sister. She is preparing to take the university entrance exam to become a doctor, and visits Satoko in hospital.
She worries about Shun, who continues to work as a hunter despite always being covered in wounds.

S-class hunter.
Vice guild master of the "Hunters" guild led by Makoto Mogami.
He has a unique ability to detect magical powers with his sense of smell. He is interested in Shun because he notices a different smell from the other hunters.

The guild master of "Hunters", the only one of the five major S-class hunter guilds with two S-class hunters.
He is the pinnacle of fire magic and is nicknamed the "Ultimate Weapon".

The Guild Master of the S-class Hunter
"Byakko" Guild.
He was one of the founders of the "Shinigami" Guild, one of the five great guilds, but founded the "Byakko" Guild after becoming independent.

Chairman of the Hunter Association. S-class hunter.
He is recorded as the first S-class hunter, but retired from active duty due to various circumstances.

Hunter Association Surveillance Division.
After the Double Dungeon incident, he visited Shun to investigate the possibility of reawakening.
He is Goto Kiyoomi's right-hand man.

C-class hunter.
Leader of the raid Shun participated in. His abilities are magical, but he is also skilled in swordsmanship.

A B-class healer.
He worries about Shun, who is constantly injured. He is mentally fragile, and participates in dungeons at a lower rank than his true ability.

A D-rank hunter.
He participates in the raid led by Mabuchi along with Shun. He has a wife and two daughters.

B-class hunter.
A member of the Hunter Association Surveillance Division and subordinate to Inukai.

C-class hunter. Leader of the Ukyo Attack Force. His younger brother is S-class hunter Ukyo Masato.