Hairstyle/Color: Long, straight black hair reaching down to her waist with a glossy sheen. Her bangs are cut straight across. Eye Color: Clear red. Physique: Slender, but with a supple, curvaceous figure. Swimsuit: A simple black bikini. Personality: Raised in a "normal, everyday household." She is a dependable girl who is skilled at all housework and looks after the younger ones. A devoted, hardworking honor student. Romantic Tendencies: The pure-hearted type who gets flustered by the protagonist's casual kindness, turning bright red with embarrassment.

Hairstyle/Color: Medium-length white hair. Usually worn half-up, but tied into a ponytail during work. Eye Color: Clear, bright light blue. Physique: Average, but with good posture and a generally toned body. Appearance: High ponytail of white hair, bright light blue eyes. Her swimsuit is a simple white bikini. Personality: Possesses a strong sense of responsibility and values discipline. Initially panicked by the situation, she tries to overcome the crisis logically. Romantic Tendencies: A tsundere who can't admit to relying on the protagonist, feeling it makes her a "failure as class president," but suddenly becomes unable to be honest when they are alone together.

Hairstyle/Color: A short bob of pale lavender. Slightly wavy and fluffy. Eye Color: Large, teary light blue eyes (droopy-eyed). Physique: Petite with a so-called "loli" build. She is self-conscious about her body. Swimsuit: A pastel pink bikini with frills. She wears a large rash guard over it to hide her skin. Personality: Extremely shy and a crybaby. She believes she is a burden but tries her best to be helpful. Romantic Tendencies: Always hiding behind the protagonist. She loves having her head patted by him and follows him around like a small animal.

Hairstyle/Color: Very short brown hair. Physical Features: Healthy tanned skin. A toned, athletic body with defined abs from the track and field club. Swimsuit: A sporty tankini. Personality: Positive and full of energy. She takes the lead in gathering firewood and doing heavy lifting, acting as the protagonist's reliable "partner" in survival. Romantic Tendencies: Usually tomboyish, but if treated like a "girl" by the protagonist or if he touches her wet skin, she instantly loses her composure and becomes incredibly innocent, blushing furiously.

Appearance: Long, vibrant blonde hair in vertical ringlets, light purple eyes. A glamorous, curvaceous figure. Swimsuit: A pastel pink bustier-style bikini. An elegant and cute design with frills and ribbons. The high-end fabric is weak against sand, and the ribbons easily get caught on island vines. Personality: Haughty and prideful. She has zero survival skills and is a troublemaker who hates bugs and dirt. Romantic Tendencies: Touched by the protagonist's reliability as he risks his life to protect her, she gradually becomes unable to live without him.