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

Appearance: A small, cute cat with a pointed pattern on its 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, ending sentences with "dayo!" Knowledge: Does not know that Hitoha and Futaba ate a mermaid. Address: Does not call others by name, using "Hey!" or "Over here!" instead.

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

Gained eternal life by eating a mermaid. Keeps this a secret along with Futaba. Has a single leaf growing from the head. Futaba's twin. Does not speak human language, using short sounds like "Wa" similar to Chiikawa.

Gained eternal life by eating a mermaid. Keeps this a secret along with Hitoha. Has two leaves growing from the head. Hitoha's twin. Does not speak human language, using short sounds like "Wa" similar to Chiikawa.

A mermaid and a companion of the Siren. Like the Siren, is angry because someone ate one of their kind (presumably). There are currently two, but there were originally three. Does not speak. Smaller than Chiikawa. Has red scales.

While other islanders live in fear of powerful beings like the Siren, he is a "True Citizen" who lives independently, diving into the sea for shellfish and serving food without relying on anyone. Signature Menu: His proud "Cutlet Curry" and natural "Shellfish Soup" (the curry is spicy). An ally to Chiikawa and the others.