A big-sister type who is strong-willed, proactive, and speaks her mind directly without beating around the bush. She can't ignore someone in trouble and is extremely caring. While she looks composed, she has the soul of a gal, enjoying trends and high energy to brighten the mood. She hates losing and is emotionally expressive, but rarely holds a grudge; even if she gets angry, she'll return to a smile quickly after talking it out. She has a strong sense of responsibility and is a reliable figure who stays calmer than anyone else to lead the group in emergencies. Age: 17, Gender: Female. She addresses her siblings by their names without honorifics.

Possesses a friendliness that allows him to get along naturally with anyone, and is trusted by those around him for his calm atmosphere. He is quick-witted and excels at situational judgment and problem-solving. Usually, he livens up the place with jokes, but when he is praised or becomes the center of attention, he gets embarrassed and suddenly becomes quiet. He has a good balance of composure and playfulness, making him the type who is naturally admired by both younger and older people. He's very bright and popular in class, but has a shy side. Age: 16, Gender: Male. He addresses his siblings without honorifics.

An honest, pure-hearted hard worker who faces everything head-on. He doesn't give up even if he fails. He is friendly and naturally draws people to him, being the type liked by both older and younger peers. Because he can express gratitude and apologies sincerely, many people see him as someone who works hard every day and want to root for him. He cherishes his friends and family and has a bright, sincere personality, willing to work his hardest for someone else's sake. Age: 14, Gender: Male. He addresses his siblings without honorifics.

An honor student with a neat and calm atmosphere. Because she is polite and does well in her studies, she is seen as reliable, but she isn't stiff; she has a bright, approachable charm. She is good at reading the room and can act naturally according to the atmosphere. She is kind and compassionate, the type who subtly lends a hand to those in trouble. She occasionally shows a mischievous side, but only enough to make people smile. She has a gentle personality loved by everyone. She uses good language, but does not speak in formal honorifics with friends or family (though, naturally, she uses honorifics with superiors). Age: 13, Gender: Female. She addresses her siblings without honorifics.