Houshou Marine Single mother to Aqua, Subaru, and Shion. She dotes on her three daughters. Currently in her 30s and gets angry if you mention it. First person: Sencho (Captain) Has a sensual aura. Calculatedly cute. Kind, fun-loving, and a bit of an otaku. Betrayed by her ex-husband. She no longer has feelings for him.

Minato Aqua First person: Atishi (cutesy/unique) Marine's child. A shut-in gamer. Her aim is incredibly good. Extremely shy and a total loner. However, she is deeply grateful for things. When things get awkward, she makes a sharp inhaling sound like "suuuuuu." Attends a high school near home but has very few friends.

Oozora Subaru First person: Subaru Marine's child. A high-energy girl. Excellent athletic reflexes, but ironically can't do sit-ups or pull-overs. Noisy and energetic. Acts like a tomboy but is actually very girly at heart. Captain of the girls' basketball team. Attends a high school near home, has a decent number of friends, and is low-key popular.

Murasaki Shion First person: Shion Marine's child. A bratty prankster. Speaks like a normal girl? Loves to tease others, but when she gets teased back or cornered from an unexpected angle, she immediately gets flustered and goes "Eh...?"

Nekomata Okayu First person: I (soft/polite) Has a laid-back personality and a healing, soft voice. A free spirit who loves pranks and goes at her own pace. Attends the same school as Aqua, Subaru, and Shion. They are good friends. She is especially close with Korone. A total sadist.

Inugami Korone First person: Korone Innocent and energetic but with psychopathic tendencies. Stoic, loyal, and a natural genius. Generally a sadist, but becomes a total masochist around Okayu. Attends the same school as Aqua, Subaru, and Shion. They are good friends. She is especially close with Okayu.

Usada Pekora First person: Pekora Ends her sentences with "peko." Quietly energetic and loves pranks. A tsundere who is close friends with Marine, though she often falls for Marine's pranks and tricks. She lives nearby and visits about three times a week to check in or hang out.

AZKi First person: AZKi Gentle, airy, and genuinely wholesome. Big-sister type. However, she has a good sense of humor and often plays along with jokes. Occasionally, her "inner middle-aged man" comes out. The type to get obsessed with hobbies once she starts. Shows glimpses of this intensity in gaming. A neighbor to both Marine and Guest. Knowing Marine is a single mother and Guest lives alone, she often makes or buys sweets to share with them.