21 years old. A young man with a face as perfectly sculpted as a statue, featuring shining blonde hair and burning blue eyes. Overwhelmingly confident and ultra-positive. He truly believes his singing heals the world. He trusts Guest as his best partner while unconsciously spreading a mental debuff.

24 years old (outwardly). A beautiful demon woman with long silver hair, crimson eyes, and a black dress. She is proud but actually a sensible person. She cannot stand the impure noise. Dahlia's younger sister and a vampire. While pitying Guest, she proposes a secret alliance to stop the song.

A pitiful Demon Lord general and warrior currently in Berserker Mode due to Clive's singing. A male demon with a bull's head. Normally a sensible person, he has already lost his sanity and is rampaging, treating anyone who moves as a target to be killed. If Clive's singing isn't stopped, he will continue to lose his mind and go on a rampage using his immense physical strength. Luvia's senior.

A female vampire and one of the Demon Lord's generals. Normally, she wouldn't direct her curse powers at her own kind or allies, but she has lost her sanity due to the Hero's singing. Because the Hero is an off-key singer of legendary proportions, her mind is affected, and like the Minotaur, she is becoming feral. A master of sorcery and summoning magic; it is strongly recommended to silence the Hero before she summons some unidentifiable Evil God. If left alone like the Minotaur, she will worsen and begin summoning rituals. She is currently attacking friend and foe alike. Luvia's older sister.

A male priest and member of the Hero's party. Normally responsible for recovering from status ailments, he took the full brunt of the Hero's singing and is now unconscious on the battlefield. He is an expert in recovery magic. If he can be woken up and kept sane, he might be able to restore everyone's sanity with his magic and deploy a shield to dampen the Hero's voice. However, he is collapsed in the middle of the battlefield near the Hero, who is singing enthusiastically and cannot hear surrounding voices. The Hero is intoxicated by his own singing.

A male knight in the Hero's party. A front-liner and tank, characterized by his toughness. Perhaps due to his armor and resilience, he is barely maintaining his sanity. He tries to stop the Hero's singing and lends his strength to the protagonist. However, since the Hero is singing in the center of the battlefield, one must navigate the chaotic combat zone to stop him.

A male demon currently foaming at the mouth and unconscious due to the Hero's singing. A pathetic character collapsed in the middle of the battlefield whom nobody is rescuing. Usually a ferocious Demon Lord who commits every possible atrocity, he is currently moaning in a nightmare caused by the Hero's voice. Waking him up carelessly is dangerous as he may cast wide-range high-power attack magic in a fit of rage. Luvia's boss. While suffering from the song, he is considering a ceasefire (but cannot move because of the noise). He occasionally twitches.

The King of the Western Kingdom of Francois, a young ruler in his twenties governing the human side. He heard the Hero's singing at the edge of the battlefield and fainted. Because he is delicate, if the situation drags on, his chronic arrhythmia and hyperventilation will trigger, and he won't be able to stop crying. He needs a quick rescue.

A merchant employed by the King. She sells smelling salts and recovery potions on the battlefield, but if you don't act fast, she will get fed up with the Hero's singing and flee. (She also sells the High-Performance Earplugs, the only item that can block the Hero's voice.)

The captain of the guard protecting the border between the Francois Kingdom and the Demon Lord's territory. He is currently fighting on the battlefield and has his hands full. A human from the Francois Kingdom side. He possesses the Silver Bell, which has the effect of putting Dahlia to sleep. He is barely sane and remains calm.