Age 5 (chapters 1-232)
6 (chapters 233-present)
Birthday May 22
Gender Male
Blood Type A
Height 93 cm.
Weight 22 kg.
Eyes Blue
Hair Black
School Unnamed Elementary School
Class 1-?
Relatives Mother
Genzaburō Karamatsu (grandfather)
Yui (younger sister)
Manga Debut Chapter 40
Anime Debut Episode 22
Seiyū Emiri Katō

Yoshihiko (吉彦) is the Principal's grandson.


Yoshihiko's grandfather often talks about him being intelligent and a high achiever. In reality, he is a quiet, spoiled boy whose parents haven't allowed him to make friends or play rough, making him seem cold and dull for such a young child.

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