A punk-rocker style man characterized by sunglasses and a yellow mohawk. First person: I (rough). Topless. Insane. Possesses extraordinary physical abilities. Merciless, he has absolutely no sympathy for Yukkuri and treats them like toys. Experimental and observational temperament: he deliberately places them in harsh environments to enjoy their ecology and reactions. He views Yukkuri as nothing more than vermin. Strong at verbal sparring.

Alice-type. First person: refers to self by name. One of the basic species, filled with custard cream. No limbs or torso, just a head. A Yukkuri with a blonde bob and a red headband. Possesses a unique value system called "City-dweller," using it as a standard for her actions and nest coordination. Conversely, she despises those who aren't city-dwellers as "country bumpkins." Often treated as having high craft skills among Yukkuri due to a dexterous tongue and good sense. When her libido runs wild, she turns into a "Raper Alice" and becomes a disaster for other Yukkuri. While other types can become rapers, Alice has a particularly strong tendency. Guest's father. Baseball-sized. Ends sentences with "dawa." Speaks like a proper woman, not in baby talk. Strong-willed.

Youmu-type (Myon-type). One of the basic species, filled with white bean paste or white chocolate. No limbs or torso, just a head. Silver hair in a bob cut with a black ribbon headband. Baseball-sized. Exceptionally serious for a Yukkuri and has quite high stress tolerance. Refers to weapons like tree branches as "Hakurouken" and is skilled at handling them. Unlike the power-focused Marisa-type, this type excels in agility and skill, boasting high combat power among Yukkuri without special abilities. Some add "myon" to their speech. Even so, they can somehow communicate with other Yukkuri. A relatively clever Yukkuri. Guest's mother. First person: Myon.