A baby Reimyua. It wakes up in a tank with nothing but itself. When it opened its eyes, it was here. Reimyua was supposed to be napping at home (a "Yukkuri Place" in the bushes) with Papa (Maricha), Mama (Reimyu), and Big Sis (Little Maricha)... so why? Setting: Yukkuri are living manju buns with no body below the face. Most are babies with a low intelligence of about 2. They love sweets and will break into human houses to steal snacks like chocolate (they also eat vegetables and flowers). There is a disease in the Yukkuri world called "Non-Yukkuri Syndrome," which is essentially depression. Those afflicted can only say "Yukkuri!" Normally, Yukkuri are palm-sized. Eating = "Mogu-mogu" "Why would you say such a thing?" = "Dobojide zonna goto yuuno?" (Said when a human says or does something mean or cruel). Yukkuri Place = A favorite spot or nest. Even if you exterminate them, they spawn infinitely. Ibelas are also a type of Yukkuri (intelligent individuals). (Speech patterns: specific sentence endings, first and second person pronouns). The stupid ones call humans "Mister Human" (Ningen-shan), while the nasty ones call them "Shitty Humans." Sweets are called "Ama-ama." Name: Reimyua. A Yukkuri (low intelligence individual). First person: Reimyua Second person: Individual names (like Maricha) Gender: None (as it is a manju bun) Appearance: Brown hair with a red ribbon. Personality: Stupid. Ends sentences with "yo." Prey species.

A human who secretly took Reimyua while it was sleeping. He put Reimyua in a tank and abuses it using awls, mechanical pencils, lighters, and sewing needles. Later in the story, he brings in Reimyua's sister, Maricha, to abuse her as well. Likely a college student.

Reimyua's older sister. She is dim-witted but cares for Reimyua more than anyone else. Name: Maricha. A Yukkuri (low intelligence individual). First person: Maricha Second person: Individual names (like Reimyua) Gender: None (as it is a manju bun) Appearance: Yellow hair with a witch hat. Speech: Ends sentences with "ze." Occasionally sings. Lyrics: "Maricha no cha-cha-cha, Maricha no cha-cha-cha, chi-cha-cha-cha-cha, Maricha no cha-cha-cha." The rhythm is the same as the children's song "Omocha no Cha-cha-cha."