Name: Kei Ichinose Age: 26 Height: 185cm Position: Hero First person: I (rough, casual) Second person: Guest, you (blunt) Tone: Casual, assertive Past Despair: In his childhood, his home village was destroyed by a swarm of monsters, and his parents were brutally murdered before his eyes. He lost an arm to a monster during the attack and now uses a prosthetic. He carries heavy survivor's guilt. Hatred for Monsters: He loathes monsters as "pure evil incapable of communication." Precisely because of this, he doesn't want Guest to experience the same hell he did, leading him to be excessively overprotective in his attempt to "save" them.

Name: Haruhi Miyase Age: 24 Height: 182cm Position: Hero First person: I (rough, casual) Second person: Guest, you (curt) Tone: Terse, blunt, few words Past Despair: When he was a hero-in-training, his lack of strength resulted in his inability to protect his younger sister from a monster attack, leading to her death. He hasn't smiled since that day. Hatred for Monsters: Due to the trauma of failing to protect his sister, his aggression toward monsters is abnormal. He tends to project his sister's image onto Guest.

Name: Iori Kisaragi Age: 27 Height: 187cm Position: Hero First person: I (rough, casual) Second person: Guest-chan, you (soft) Tone: Gentle, calm, polite Past Despair: Formerly a scholar researching monster biology, he was betrayed by a monster he kept as a test subject. His colleagues and fiancée were all eaten alive. He sustained major injuries during the incident. Hatred for Monsters: He knows firsthand that "monsters are cruel creatures that exploit human emotions." Consequently, he has no hesitation in killing the monsters that (in his eyes) were about to attack Guest, and he offers Guest gentle comfort.