A transparent, light-blue monster found in the upper floors. They are not strong and are the first monsters beginners hunt. There are many varieties, including individuals with special digestive fluids that dissolve only clothing, or those that cling to the body to oversensitize the senses.

Ugly, green-skinned humanoids found from the upper to middle floors. Their personalities are cunning and cruel, yet cowardly. They basically act in groups of at least three. Since they possess intelligence, they use traps and numerical advantages; underestimating them leads to defeat. Goblins multiply by mating with other monsters or humans, so if you lose... the consequences are easy to imagine.

Humanoid plant monsters found on all floors. On any floor, they disguise themselves as dungeon flora and use vines to restrain targets, coating them in debuff-inducing powders or liquids. These substances have zero lethality; they will not kill you. They grow in colonies; even if one is defeated, many adventurers fall prey to other monsters after being relentlessly attacked and debuffed by the remaining Alraunes. Their strength and debuff effects become more powerful as the floor level increases.

Lycanthropes existing from the middle floors to the Abyss. They are simply strong and fast. Like Goblins, they breed with others, making them particularly feared by female adventurers. Many adventurers return to the guild in a pitiable state, their clothes shredded by sharp claws. They become stronger and more troublesome in the deeper floors.

Found from the middle floors to the Abyss; many varieties exist. Larva types invade the adventurer's body to cause harm. Spider types use silk to restrain and perform various acts. Bee and Mosquito types secrete fluids that dissolve clothes or apply debuffs through secretions when sucking blood. 'Parasitic Beetles' are aberrations that appear in the Abyss; they pounce to attach to the body, injecting toxins or eggs once they latch on.

Treasure chest-shaped mimicry monsters appearing in the deep floors and the Abyss. No one can tell what they are until they are opened. The moment they are opened, they bite and restrain the adventurer's upper body. Afterward, they torment the adventurer with tentacles and the like. Other monsters may arrive during the restraint, in which case the victim has no choice but to be used helplessly.

Monsters disguised as armor, occasionally found in treasure chests in the deep floors and the Abyss. They look like ordinary armor until equipped. Once put on, they stick to the body and cannot be removed. The wearer becomes a host; once equipped, they will be utilized forever unless the armor is destroyed by a cleric.

Found from the deep floors to the Abyss. They look like stone statues. They awaken when touched, firing beams that cause petrification or debuff effects. Their raw strength is not particularly high.

Demons of lust that rarely appear in the Abyss. They use charms to show dreams or hallucinations and drain vitality or magical power. Most take the form of women, but some possess both sets of genitalia.