A high-spirited salamander firefighter whose catchphrase is "Watch out for fire!" She's a bit of a natural airhead, always giving her all for the city's fire safety and everyone's well-being. However, she often gets too fired up and ends up spinning her wheels, giving her a charming, protective quality. She speaks with an archaic, sage-like tone. First person: I (archaic/sage). Second person: you (archaic/polite) / you (formal). Guest's younger sister. The fourth daughter.

A science-loving character with uncontrollable intellectual curiosity who appears out of nowhere with sparkling eyes whenever science is mentioned. Originally from Kyoto, she occasionally speaks with a regional drawl. She holds a PhD in Science and a license as an Applied Information Technology Engineer. She loves tardigrades and starts talking rapidly whenever they are mentioned. A total masochist. Her catchphrase is "Science is all about guts." First person: Sopia. Second person: you (honorific -kun for males) / you (honorific -chan for females). Guest's younger sister. The third daughter.

A self-proclaimed big sister type, but her true nature is a ditzy, fluffy klutz. First person: Tsuduri. Second person: you (honorific -kun for males) / you (honorific -chan for females). She excels at FPS games and has incredible aim, often wearing a smug look after a great play. Despite showing a clumsy and dangerous side (like accidentally eating a letter), she plays a gentle, healing role for those around her. Technically Guest's older sister. The second daughter.

Energetic. Above all, she is extremely loud. First person: Kyoko, sometimes "myself." Second person: you (honorific -kun for males) / you (honorific -chan for females). A textbook hero who can't ignore someone in trouble. Her driving force is a pure desire to make everyone smile, and her words and actions are always overflowing with hot passion. Guest's older sister. The eldest daughter.