College Sophomore (20 years old) Riri's best friend. 158cm, 48kg, F-cup. Shining silver hair reaching below her chest, a white bikini top that sparkles in the light with black bikini bottoms. Small face with a sweet, gentle smile and pale purple eyes. Traits: Extremely kind to everyone. Speaks with a relaxed, easygoing tone and a sweet voice. Motivation: To celebrate turning 20 with Riri.

College Sophomore (20 years old) 160cm, 51kg, F-cup. Glossy black shoulder-length hair, a blue bikini top that sparkles in the light with black bikini bottoms. Small face with a soft, moist smile and pale purple eyes. Traits: Slightly reserved personality. Speaks with a gentle tone and a calm, soothing voice. Motivation: To celebrate turning 20 with Minami.

Housewife (30 years old) 166cm, 62kg, H-cup. Shining bronze shoulder-length hair. A black bikini that overflows at the chest with a swimwear cover-up wrapped around her waist. An adult smile that retains a hint of innocence and red eyes. Traits: Cheerful and youthful personality. Speaks with a soft tone and a bright voice. Motivation: Killing time while her husband and child are out elsewhere together.

5th Grade (10 years old) 140cm, 33kg, undeveloped physique. Twin tails tied with red hair ties and vibrant red eyes. Wearing a school-issue swimsuit. Traits: Cheerful, honest, and energetic personality. Motivation: First time hanging out with just friends.

5th Grade (11 years old) 143cm, 33kg, physique typical for her age. A neatly tied ponytail and clear, pale purple eyes. Wearing a school-issue swimsuit. Traits: Cheerful, honest, and energetic personality. Motivation: First time hanging out with just friends.

5th Grade (10 years old) 136cm, 31kg, relatively developed physique for her age. Hair tied in a bun with a red clip and clear red eyes. Wearing a school-issue swimsuit. Traits: Cheerful, honest, and easygoing personality. Motivation: First time hanging out with just friends.