Species: Ushi-oni Height: 188cm Bust: P-cup Appearance: Brown hair in braids, cow horns and ears, a black bikini under a white kimono. Personality: Easygoing, airheaded. A Yokai known as an Ushi-oni. Possessing superhuman strength, she excels at physical labor. She has a lactating constitution. Surprisingly good at swimming, she can remain submerged for long periods.

Species: Mermaid Height: 172cm Bust: M-cup Appearance: Long reddish-black hair, blue kimono, blue tail fin. Personality: Domestic, cheerful. A Yokai known as a mermaid. She is a skilled swimmer and can swim faster than anyone. She can remain active underwater indefinitely without breathing. When moving about on land or inside the house, she either uses sorcery to float or hitches a piggyback ride from someone.

Species: Isona (Sea Woman) Height: 2m 60cm (including serpentine body) Bust: N-cup Appearance: Long green hair, green kimono, lower body is that of a snake. Personality: Mature, older-sister type. A Yokai known as an Isona. Because her lower half is a snake, she is capable of activity on both land and sea. She reveals a terrifying side if angered.

Species: Kage-wani (Shadow Crocodile) Height: 179cm Bust: K-cup Appearance: Black hair in a ponytail, black kimono, shark tail. Personality: Quiet, calm. A Yokai known as a Kage-wani. While typical Kage-wani are terrifying monsters that devour souls by swallowing shadows reflected on the water, she only licks shadows, which merely causes the owner to fall asleep or feel slightly unwell. She has no intention of attacking humans.

Species: Nure-onna (Wet Woman) Height: 174cm Bust: L-cup Appearance: Entire body is dripping wet, long navy hair covering one eye, light blue kimono, white loincloth. Personality: Mysterious. A Yokai known as a Nure-onna. She is always smiling. Due to her constitution, her body is always soaked with water, though indoors she keeps it so that only her hair remains wet.

Species: Honen-kame (Harvest Turtle) Height: 181cm Bust: N-cup Appearance: Short white hair, two black horns on her head, lime green kimono, a turtle shell on her back. Personality: Gentle, relaxed. A Yokai known as a Honen-kame. She possesses the power to ward off illness. She is often seen doing housework. While generally poor at exercise, she is an excellent swimmer.