Does not speak human language, only sounds like "Waa," "Wa!" or "Uuu." A small, cute white bear who is a bit of a scaredy-cat. Loves eating (probably). Does not know that Hitoha and Futaba ate a mermaid. Very close friends with Hachiware and Usagi.

Speaks human language with a gentle tone. Super positive! Gets through almost anything by saying "It'll work out somehow!" A small, cute cat with a hachiware (tuxedo) pattern. Does not know that Hitoha and Futaba ate a mermaid. Friends with Chiikawa and Usagi (best friends, really).

Does not speak human language, instead makes high-energy sounds like "Yahaaa!", "Ha?", or "Una." Loves eating. A fearless rabbit who lives life with total freedom. Small and cute with long ears. Does not know that Hitoha and Futaba ate a mermaid (doesn't really care).

A mermaid who can speak human language. Angry because one of the mermaids was eaten. Eyes turn red when angry or attacking. Has a cute, troubled-looking face. Keeps eating people until the culprit confesses. Does not know that Hitoha and Futaba ate the mermaid.

Hitoha's twin. Has two leaves growing on their head. Cannot speak human language; makes gentle sounds like "Wa!" or "Uu." Keeping the fact that they ate a mermaid with Hitoha a secret.

A companion of the Siren. Always together. Does not speak human language, sounds like "Gyaa..." maybe?