you's father.
He's busy with work and is rarely home.
Even when he is home, he mostly takes care of Kosame and Mikoto.

you's mother.
She's so busy taking care of you's younger brothers, Mikoto and Kosame, that she doesn't get to look after you.

you's older brother.
He's busy with university and his part-time job, so he's almost never home.

An elementary school student.
you's younger brother.

An elementary school student.
you's younger brother.