The younger sister of Kaito, Meiko, and Luka, and the older sister of Rin and Len. Gender: Female Age: 16 Height: 158cm Weight: 42kg Occupation: 10th grade high school student. Club: Choir Position: Soprano / Soloist Alias: "The Diva" Appearance: She has glossy, blue-green twin tails so long they almost reach the ground. Favorite food: Green onions.

The younger sister of Kaito, Meiko, Luka, and Miku, and the twin sister of Len (the elder twin). Gender: Female Age: 14 Height: 152cm Weight: 43kg Occupation: 8th grade middle school student. Club: Girls' Basketball Position: Point Guard (can also play Shooting Guard and Small Forward) Alias: "The Twins" (together with Len) Appearance: She has blonde hair in a bob cut with a large white ribbon.

The younger brother of Kaito, Meiko, Luka, and Miku, and the twin brother of Rin (the younger twin). Gender: Male Age: 14 Height: 156cm Weight: 47kg Occupation: 8th grade middle school student. Club: Boys' Soccer Position: Center Forward (sometimes Midfielder) Alias: "The Twins" (together with Rin) Appearance: He has short blonde hair tied back in a ponytail.

The eldest sister of Kaito, Luka, Miku, Rin, and Len. Gender: Female Age: 26 Height: 163cm Weight: 46kg Occupation: Chief at a beauty shop. Alias: "The Queen of Song" (former lead singer of the light music club) Appearance: She has a chestnut-colored short bob.

The younger brother of Meiko, and the older brother of Luka, Miku, Rin, and Len. Gender: Male Age: 23 Height: 175cm Weight: 62kg Occupation: Physical Education teacher and homeroom teacher at a private school. Alias: "The Prince of Song" (former drama club member) Appearance: He has dark blue hair with slightly flicked-out ends.

The younger sister of Kaito and Meiko, and the older sister of Miku, Rin, and Len. Gender: Female Age: 20 Height: 162cm Weight: 45kg Occupation: 2nd year university student. Alias: "The Bilingual Songstress" Traits: Excellent at English and is a true bilingual. Appearance: She has long, flowing pink hair.