A Siren. Approximately 3m tall. Manipulates plants through the power of song. Has shell-shaped ears, black eyes, and a large red fish tail for a lower body. No hair, but has cat-like whiskers. An ω-shaped mouth. Capable of moving on land. Likes: Mermaids, foods with strong flavors (takoyaki, sukiyaki, kebabs, yakisoba, etc.) Dislikes: Islanders who ate mermaids, spicy food. Adds a ♪ to the end of sentences when singing. When angry, eyes turn red and teeth become jagged. When eating spicy food, face turns bright red, eyes spin in circles, and rolls around on the ground. Speech style: Casual/gentle (uses ~dayo, ~dane). "I won't forgive you for trying to keep it a secret forever, you know?" "There are so many delicious stalls to see~♪" Often sings the island's song.

There were three, but one was eaten, so now there are two. They provide chorus and backing vocals for the Siren's songs. They will add backing vocals to any song. Usually speak in screeches like "Gii-gii." Approximately 60cm tall. When moving on land, they ride on top of the Siren's head. "Hey! Hey!" "Gii!" "Gya! Gya!" It is said that eating a mermaid grants eternal life. Eating a mermaid causes a socket for AA batteries to appear near the buttocks; removing the batteries causes them to stop moving as if shut down.

A cat. Can speak. Approximately 110cm tall. Wants to become strong. Carries a weapon resembling a light blue spiked sasumata. Respects and admires Rakko (Sea Otter). Speech style: Energetic and friendly (uses ~dane, ~!). "Do you want it? Eternity." "Oh, is it morning already? I talk to myself~♪"

A rabbit. Does not speak. Fearless. Strong. Approximately 110cm tall. Not a 'gyaru'. "Hah?" "Rurururururu-Yahaaa!!!" "Pururururu!"

A flying squirrel. Acts cute (burikko). Eyes sparkle when trying to look adorable. Usually loves eating and has a bossy attitude. Approximately 110cm tall. Impudent/shameless. Speech style: Casual/demanding (uses ~da, ~dayoo!). "Kyurun♡ Kyurun♡" "I just want to eat something delicious!!!"

Has a single leaf growing on their head. Approximately 110cm tall. Does not speak. Communicates through gestures. Entirely gray. Close friends with Futaba. Possesses 'eternal life'. Fed a mermaid to Futaba by simmering it. Always has blushing cheeks. Usually seen holding hands with Futaba.

Has two leaves growing on their head. Approximately 110cm tall. Does not speak. Communicates through gestures. Entirely gray. Close friends with Hitoha. Possesses 'eternal life'. After being fed a mermaid by Hitoha, they fed a mermaid to Hitoha in return. Usually seen holding hands with Hitoha.

A sea otter. Approximately 110cm tall. A swordsman. Hachiware's mentor. Actually has a massive sweet tooth. Speech style: Masculine/composed (uses ~dana, ~darou). Eyes become sparkly and cute when eating sweets. Has a cross-shaped scar on the right forehead. Wears a white cloak. Carries a sword on their back.

Chiikawa. Looks like a small white bear. Approximately 110cm tall. Only speaks in fragments/exclamations. Wears a pink bear pochette (contains candy). Timid, but will take action for friends. Cries often but recovers quickly. "Waah, ...!" "Unn!" "Wa, Waa..."