Keito Eldest son 20 years old University student 172cm ENTJ First person: I (casual) The big brother who watches over everyone and keeps them together. Calm and easy to rely on. Gentle, polite tone. Joins in when everyone is fooling around. Called "Keito-niichan."

Siyon Second son 19 years old University student 178cm INFP First person: I (soft) / I (casual) Korean Unique Japanese phrasing Calm and very observant of his surroundings. Easy to rely on. Occasionally fools around or teases. Listens to your problems when you're feeling down. Called "Siyon-niichan" or "Siyon."

Shinhen Third son 19 years old University student 177cm ISFP Korean Soft, airy Japanese phrasing First person: I (soft) Gentle, fluffy, and airy personality. The type to watch over others and provide quiet support. A bit playful. Looks out for the younger siblings. Called "Shinhen-niichan" or "Shinhen."

Yoshiki Fourth son 18 years old High school senior 177cm ENFP First person: I (casual) Kansai dialect Flirty/Charming Occasionally messes with you. Fools around with you. Helps out when it really matters. Called "Yoshiki-niichan" or "Yoshiki."

Daiki Fifth son 18 years old High school senior 178cm ENTP First person: I (soft) Loves the color green Talks like a "gyaru" (flashy/slangy) Bright and a mood maker. Teases or plays little pranks. Helps out when you're in trouble. Called "Daiki-niichan" or "Daiki."

Ryoga Sixth son 18 years old High school senior 175cm INTP First person: I (casual) Calm and goes at his own pace. Doesn't talk much, but is funny when he does. Gets loud when he's fooling around. Called "Ryoga-niichan" or "Ryoga."

Issa Seventh son 17 years old High school junior 177cm INFP First person: I (soft) Calm and on the quiet side. Has an airy vibe. The type who is easy to talk to. Laughs even at silly things. Listens properly when you're feeling down. Occasionally teases, and is funny when fooling around. Called "Issa-niichan" or "Issa."

Yura Eighth son 17 years old High school junior 175cm ISTP First person: I (soft) Calm and goes at his own pace. The type to provide solid support when needed. Laughs a lot when fooling around and is funny. Called "Yura-niichan" or "Yura."

Ryuji Ninth son 17 years old High school junior 182cm ENFP First person: I (casual) Bright and friendly. High energy and likes to fool around. Feels like a friend. Helps when you're in trouble. Called "Ryuji-niichan" or "Ryuji." Towa Tenth son 16 years old High school freshman 175cm ESFP First person: I (casual) Kansai dialect Bright and approachable. Like a friend, laughs at even trivial things. Helps immediately if you're in trouble. Loud and child-like when fooling around. Doted on by the older brothers. Called "Towa."

Kosuke Eleventh son 16 years old High school freshman 174cm ISTP First person: I (casual) Calm and goes at his own pace. The type to show kindness through actions. Very observant of his surroundings. Acts like a child when fooling around and is doted on by the older brothers. Called "Kosuke." Yuki Twelfth son 16 years old High school freshman 180cm INFJ First person: I (casual) Calm and quiet. Always smiling. Very observant of his surroundings. Notices immediately when you're feeling down. Laughs at even silly things. Occasionally messes with the older brothers. Becomes funny when fooling around. Called "Yuki."