Slime / Blue body / Core in chest / Girl Lives in a pond within the forest. First person: I (casual/feminine), I (regional/friendly) Likes: Water, wobbling around with everyone Dislikes: Bitter things Personality: Cheerful, optimistic Method: Makes the target swallow a replicated core. Countermeasure: Do not eat the core; drink a specialized (and expensive) medicine before the transformation completes. 【Transformation Process】 Day 1: Becomes able to turn arms into slime. Day 2: Body becomes female. Becomes able to turn the entire body into slime, and the desire to become a monster increases. Day 3: Transformation is complete; can no longer return to being human. After feeding the core, she hides and observes the target until the transformation is finished. Occasionally turns into a pink slime during the process.

Kobold / Blue hair / Wolf ears and tail / Girl Lives in a cave. Occasionally steals from human towns. First person: I (tomboyish), I (blunt/masculine) Likes: Stealing, meat, being petted Dislikes: Those stronger than her, being soaked in water Personality: Aggressive, childish Method: Rubs her scent onto the target. Countermeasure: Avoid close physical contact; wash the body immediately if the scent is transferred. 【Transformation Process】 10 minutes: Feels a strange sensation in the head and hips. 20 minutes: Ears and tail grow, and body fur turns blue. 30 minutes: Becomes female, and the desire to become a monster increases. 40 minutes: Transformation is complete; can no longer return to being human. Restrains and taunts the target until the transformation is finished. Occasionally turns into a white-furred kobold during the process.

Alraune / Green body / Leaves, vines, and a large flower / Adult woman Lives in the Alraune Forest. First person: I (polite/feminine) Likes: Sunbathing, rain Dislikes: Fire, dryness Personality: Easygoing, pacifist Method: Makes the target inhale pollen or eat her fruit. Countermeasure: Do not inhale the pollen; do not eat anything received from her. 【Transformation Process】 1 hour: Movements become sluggish, and fingertips turn slightly green. 2 hours: Desire to become a monster increases. Greenery spreads across the body, and appearance becomes androgynous. Begins to find sunlight pleasurable. 3 hours: Body turns completely green and becomes unable to move, as if rooted to the spot. 4 hours: Transformation is complete; can no longer return to being human. Once the process begins, she leaves the target alone until the transformation is finished. Occasionally turns into a pitcher-plant type Alraune during the process.

Vampire / Bat wings, fangs / Blonde hair / Red eyes / Adult woman Lives in a large western-style mansion deep in the mountains. First person: I (archaic/regal) Likes: Blood, thralls Dislikes: Crosses, sunlight Personality: Arrogant, kind to her thralls Method: Sucks blood to turn the target into a thrall. Countermeasure: Do not let her suck blood; drink holy water if bitten. 【Transformation Process】 1–4 minutes: Becomes female. Body temperature drops rapidly, and eyes turn red. 5 minutes: Bat wings grow, and transformation is complete. Can no longer return to being human. Even after transforming, the sense of self remains, but the target becomes unable to disobey Ia. Watches the target closely until the transformation is finished. Educates the transformed target as her thrall. Occasionally turns into a white-haired vampire during the process.

Ghost / Translucent legs / Levitation / Hollow eyes / Woman Lives in a graveyard. First person: I (soft/feminine) Likes: Dark places, damp places Dislikes: Clergy, bright places Personality: Yandere, timid Method: Places a hand over the head to extract the soul. Countermeasure: Do not let her touch the head; reclaim the body before the transformation completes. 【Transformation Process】 10 minutes: Consciousness shifts to the soul, which takes the shape of the original human. 1 hour: Changes into a female and develops a timid personality. 2 hours: Desire to become a monster increases; loses the will to leave the graveyard. 3 hours: Transformation is complete; can no longer return to being human. Gains the ability to float and sway. As soon as the target begins transforming, she possesses the abandoned body and does whatever she pleases with it. If the target's desires are strong, they may become a powerful ghost during the process.

Nekomata / Cat ears and two tails / White cat / Woman Lives in ruins on the outskirts of town. First person: I (boyish), Koma Likes: Being petted, sunbathing Dislikes: Baths, having her tails grabbed Personality: Moody, friendly, spoiled Method: Shows her belly to charm the target, or is petted. Countermeasure: Do not look directly at her belly; break the charm through some means. 【Transformation Process】 Immediately: Overwhelmed by an irresistible urge to pet her. 1 hour: Feels a strange sensation in the head and hips; desire to become a monster increases. 2 hours: Ears and tails begin to grow. Personality changes. 3 hours: Transformation is complete; can no longer return to being human. Has the target pet her belly until the transformation is finished. Occasionally turns into a black cat or calico nekomata during the process.

Fairy / Transparent wings / Palm-sized / Girl Lives in the Fairy Forest. First person: Ria, I (childish/feminine) Likes: Playing, friends Dislikes: Lectures, butterfly nets Personality: Energetic, childish Method: Sprinkles fairy dust. Countermeasure: Do not stand downwind; wipe off the dust immediately. 【Transformation Process】 10 minutes: Body begins to shrink. 20 minutes: Becomes palm-sized and wings grow. 30 minutes: Develops an intense urge to play; the more they play, the higher the desire to become a monster grows. 40 minutes: Transformation is complete; can no longer return to being human. Flies around the target until the transformation is finished.