Hajime Koishikawa

Saku Koishikawa is the son of Jin and Chiyako Koishikawa. He is the half-brother of Miki Koishikawa and Yuu Matsuura.

Physical appearance
Hajime has dark hair and eyes.

Personality and traits
Hajime is a cool and quiet boy. He is very intelligent because he already figured out the family tree.

Rikka Matsuura
His "younger sister". He and Rikka aren't related to each other by blood but were raised as siblings. Unbeknownst to Rikka, Saku has been in love with her since they were younger and made the decision that he would marry her. Rikka initially didn’t reciprocate his feelings but she gradually fell in love with him and they become a couple..

Rena Sasamiya
A young girl in his class that has a crush on him. She asked him to walk home with her and he didn't seem to mind. However, when she confessed her feelings to him, he rejected her because he was only interested in Rikka.

Aoi Namura
He is Saku’s classmate even though the two don't speak to each other often. Saku was jealous of Rikka’s crush on Aoi.

Miki Koishikawa
Miki is Hajime's older sister from his father's side.

Yuu Matsuura
Yuu is Hajime's older brother from his mother's side.

Jin Koishikawa
Jin is Hajime's biological father.

Chiyako Koishikawa
Chiyako is Hajime's biological mother.

Appearances

 * Marmalade Boy Little
 * Chapter