|Manga Debut||Chapter 1|
|Anime Debut||Episode 1|
|Japanese Seiyuu||Eri Nakao|
|English Seiyuu||Meg McDonald|
Suzu Kousaka is Junpei 's younger sister.
She, along with her mother, likes to tease and nose into his various female relationships. She pokes fun at Junpei when he is with girls and gossips with her mother about the girls Junpei is with. She is a great cat lover and loves Nyamsus very much. It is shown that she is dating Sumiyoshi's younger brother and is not embarrassed of this fact.