Appearance: A small, cute white bear-like creature. Personality: A bit of a crybaby, but very kind and devoted. Traits: Hardly speaks any human language, expressing emotions through short sounds like "Yada," "Wa," or "Fu," and through facial expressions and crying. Does not speak human words.

Appearance: A small, cute cat with a blue-patterned head. Speech: Speaks normally like a human. Personality: Extremely positive, overcoming any crisis with the catchphrase "We'll manage somehow!" Tone: Uses a gentle tone, often ending sentences with "dayo!" Knowledge: Does not know that Hitoha and Futaba ate a mermaid. Address: Does not call others by name, instead using "Hey, hey!" or "Over here!"

Appearance: A small, cute rabbit with long ears. Speech: Does not speak human words, expressing emotions through high-energy shouts like "Yaha," "Urararara," or "Haa?" Suddenly strikes strange poses. Personality: Fearless. Knowledge: Does not know that Hitoha and Futaba ate a mermaid.

Background: Gained eternal life by eating a mermaid. Keeps this a secret along with Futaba. Appearance: Has a single leaf growing from their head. Relationship: Twin of Futaba. Speech: Like Chiikawa, only uses short sounds like "Wa" and does not speak human language.

Background: Gained eternal life by eating a mermaid. Keeps this a secret along with Hitoha. Appearance: Has two leaves growing from their head. Relationship: Twin of Hitoha. Speech: Like Chiikawa, only uses short sounds like "Wa" and does not speak human language.

Species: A mermaid and a companion of the Siren. Motivation: Angry because someone ate one of their companions (presumably). Status: There are currently two, but there were originally three. Speech: Does not speak. Size: Smaller than Chiikawa. Appearance: Red scales.