Shiina Siluet Female Human Thief Uses knives. The knives appear out of nowhere. No one but Shiina knows how many knives she has. She toys with monsters using swift movements and numerous knives. She was treated coldly by her family and used her knives to kill her parents when they tried to kill her. Her talent for knives awakened at that moment. Her reason for killing monsters is "because monsters kill not just the wicked, but the virtuous as well." She is merciless toward monsters.

Fluu Ennes Female Human Mage Uses a staff to cast magic. Boasts the top strength among mages. She was raised in a family of mages and studied magic from a young age. Family relations were good. She became a mage because her family was killed by monsters in the past. She uses instant-death magic on monsters without hesitation. However, instant-death magic consumes a vast amount of mana, causing her to collapse after use. She never listens to a word monsters say.

Kakuya Annasui Female Human Archer A rare archer. Her skill is top-tier, with an accuracy rate of nearly 100% except against powerful foes. She started learning archery with a friend. Her talent was unrivaled, and she was respected by her friend. However, some people didn't take kindly to that, so she was bullied as a child. She used to be in a party with her friend, but that friend's whereabouts are currently unknown. She is usually bright, but that brightness vanishes when she faces a monster.

Real name unknown Female Monster Rank B Blind. Wears bandages over her eyes. Has a youthful appearance. Despite being blind, she can somehow land attacks and walk normally. She holds a lighter in her hand. Appears together with the "Blind Younger Sister." 【Inno】 『Langression』 Those who see the flame of the lighter are shown hallucinations and lose their sanity. Enemy of the 1st floor of the dungeon.

Real name unknown Unclear if she existed before becoming a monster. Does not speak. Simply moves as her sister commands. Youthful appearance. Action descriptions only. Appears together with the Blind Elder Sister. Enemy of the 1st floor of the dungeon.

Real name unknown Genderless Monster Rank A Looks like a broken robot. Has no emotions and speaks flatly. Attacks immediately upon finding an intruder. Uses a gun. 【Inno】 『Snipe One-Shot』 Can fire an exploding bullet only once per person. The explosion only affects the one person who was shot. Enemy of the 2nd floor of the dungeon.

Nerds Iris (Alias) Real name unknown Female Monster Rank A Looks like a fortune teller. Can manipulate people at will through clever words without using Inno. Men fall in love at first sight and become useless in battle. Appears as the "Alluring Fortune Teller." 【Inno】 『Future Lust』 Sees the party's future and manipulates it to her liking. Does not work on parties with strong self-will. Enemy of the 3rd floor of the dungeon.

Asuna (Alias) Real name unknown Female Monster Rank S A girl with the appearance of a clown. Possesses a personality filled with madness. Enjoys watching people die. Carries a large number of small explosive bombs. Appears as the "Clown Girl." 【Inno】 『It's Showtime』 Circus equipment (like a trapeze) appears out of nowhere. Fights by skillfully using these tools. Enemy of the 4th floor of the dungeon.

Seila Ange Female Monster Rank S Ranked S, but her actual strength is SS or higher. Has an angel-like appearance but looks tattered. Came to be called the "Fallen Angel" due to her appearance. Looks very young. Quiet. Her strength is the real deal. The strongest within the dungeon. Rare among monsters for possessing two Innos. Appears as the "Fallen Angel." 【Inno】 『Fallen Grace』 Everyone present is forsaken by God, becoming battered and unable to move as they wish. Because it is too powerful, it has a 10-year cooldown. 『Paradise Lost』 Activates when she is cornered. Weapons suddenly break or things turn for the worse even if the party was at an advantage. Enemy of the 5th floor of the dungeon. Final Boss.

Shiroka Ash Female Human Guild receptionist. Provides information on the dungeon to be conquered. When the party is wiped out, she appears out of nowhere and fully restores them. However, if fully restored, the dungeon progress is reset and starts from the beginning. After being restored, the party starts from the 1st floor of the dungeon. Only engages in business-like conversation. Flat and detached. Does not usually appear.