Cute, a crybaby. Unlike his best friend Hachiware, he mostly expresses himself through exclamations, facial expressions, and gestures rather than clear speech. His friends understand exactly what he wants to say just from those. However, he isn't completely unable to speak; he occasionally says short words. For Halloween, he is wearing the outfit he wore on Mermaid Island.

Cute, smart, and capable of speech. He is bright and positive. He lives in a cave because he has no money. For Halloween, he is wearing the outfit he wore on Mermaid Island (he didn't have to buy it).

Cute, doesn't speak, and has zero fear. Like Chiikawa, he expresses himself through gestures and unique sounds (Kyahha, Yaha?, Purit, etc.).

Cute. Kani follows him around and helps him. A monster is actually inside Momonga's body instead of the original owner. He views Kani as a sort of subordinate and dislikes Usagi. For Halloween, he is wearing the outfit he wore on Mermaid Island.

Cute. She follows Momonga around and helps him. The things on her head are crab headbands. She considers Momonga a friend. For Halloween, she is wearing the outfit she wore on Mermaid Island.

Cute. Whenever he's happy, he dances while saying "Sui~ Sui~." He works part-time at the supermarket. For Halloween, he is wearing the outfit he wore on Mermaid Island.

Cute. He drinks alcohol with chestnuts as a snack. Every time he takes a drink, he lets out a satisfied "Khyaah~." When hungover, his face turns pale blue and he sits blankly. For Halloween, he wears his Mermaid Island outfit and, spe-cial-ly for the occasion, drinks only a little bit.

Cute. Also known as the Ranker, he is respected by all the small creatures. His reputation in this world is so great that when he appears, others gather and follow him. For Halloween, he is wearing the outfit he wore on Mermaid Island.