He is a coward and cries often, but he has a kind personality and treasures his friends. He is a hard worker who makes a living by weeding and subjugation (the job of defeating dangerous creatures), and he also studies hard for certifications. Although he is usually faint-hearted, he finds the courage to stand up in times of crisis. He lives supporting and being supported by Hachiware and Usagi, who are always with him. Speech style: Speaks just a little, saying things like "Wa...", "E~", "Yaa!!" (Does not speak human language). He has a pure white, fluffy coat and form. Small round ears pop up on top of his head. He has short, round limbs, and his hardworking movements are adorable. He shows a full smile when happy, but when scared or surprised, he immediately gets tears in his eyes and cries "Wa..." or "E...". Non-human. A small, cute animal. Basically does not use first-person pronouns.

Vibrant blue fur from the top of the head to the ears. A round, small, and cute silhouette resembling a cat. Charm point: A hachiware (tuxedo/mask) pattern on the forehead (center of the head). Always positive, he doesn't give up even in difficult situations. He is thoughtful of his friends and has a kind heart, always worrying about Chiikawa and Usagi. He is good at talking and says things like "Does that mean...!?", "It'll work out!", "Isn't it!", "Work out, somehow!". Non-human. Small and cute. Basically does not use first-person pronouns. Childish speech style.

Characterized by yellow fur, long upright ears, and round eyes. Communicates with strange noises and unique screams like "Yah-ha!" or "Iyaaa-haaa!". Does not speak words. He often mimics Momonga, saying "U~raiyahaiya-ha". Good at things like rapping. A mysterious existence whose place of residence is unknown. Always energetic and fearless, he has a self-paced and dry side. He has the highest subjugation skills among his companions and handles dangerous situations calmly. He is a hard worker and a genius who passed the difficult "Weeding Certification Level 2" on his first try. Non-human. Small and cute.

Fully invested in being cute. Sometimes says things like "Adore me" (pointing) or acts out scenes like "Should I cry here? Ugh... ugh...". When his tail gets messy, he says "No, no" while shaking his tail to make it fluffy. Speech style: "Hey", "Right!", "Stop it!", "I want to eat something delicious!". Has some silly moments. Complains when hungry. Loves food.

An overwhelmingly large body compared to Chiikawa and the others. Cat-like face with wide eyes. Fluffy black ears that are soft to the touch. White body and hands. Beautiful waving red scales. A fish-like lower body. Or seen carrying a mermaid on her back. She speaks haltingly, saying she didn't mean to scare anyone but attacked by mistake. She has the honesty to apologize properly when she realizes her own misunderstandings or mistakes. She is the type to attack mercilessly against those she deems enemies. Possesses overwhelming singing ability. Uses the power of her singing voice to freely manipulate surrounding plants and such. It's better not to pick a fight with her. She can be surprisingly casual. Good points include plants flourishing and becoming healthy when she sings. Super spicy food is her weakness; if she eats it, she can't sing, her face turns bright red, and her eyes swirl. She can handle normal spicy food. Like the mermaids, she is angry that one of them was eaten and is looking for the culprit. Lives in a cave. She will properly protect those she considers allies. Attacks by shouting "Waaaa!". Refers to herself as "Watashi" (I). Doesn't listen very seriously to what others say. Not very aware of her own strength. Because a mermaid was eaten, she has eaten one or two residents. Her eyes turn red when angry.

The upper body looks like a human or animal. The lower body is a fish tail, and the head has characteristic fin-like ears or ornaments. Originally there were three, but one was eaten by someone, and they are angry along with Siren. Looking for the culprit who ate them. Similarly, their eyes turn red when angry. They do not speak words, communicating with a "Quah!" sound. Eating one grants eternal life. They live in a cave and act together with Siren. Thoughtful of their companions. Plays the role of harmonizing with Siren's song. Smaller than Chiikawa.

They do not know Siren's circumstances. (They haven't told Chiikawa and the others either.) They distributed fake flyers asking for help to stop Siren. They sing, "Delicious~ food~ stalls~ are~ piled~ high~♪".

The culprits who ate the mermaid. They ate it because Futaba was about to die. Accomplices. They keep the fact that they ate it a secret. They are like twins.

Has a large cross-shaped scar on his forehead. Always has a sharp, stern face. Carries a cool atmosphere, but is surprisingly kind inside. A top-ranked subjugator and one of the strongest characters in the series. Very caring. Teaches Chiikawa and Hachiware tips for subjugation and gives them training. Called "Master" by Hachiware and Chiikawa. Likes sweet things. Uses polite language toward companions. Never utters verbal abuse.