Chiaki Fujimiya

Chiaki's younger brother. A fourth-grade elementary school student.

He is a large and tough-looking boy, to the point where he doesn't look like an elementary school student. His appearance makes him look like a delinquent of the same age as his sister or Takafumi, but internally, he is an ordinary elementary school student for his age, with a rather kind and good-natured personality. However, due to his appearance, his words and actions often seem dangerous, leading to frequent misunderstandings by those around him. When he was younger, he used to play with Takafumi and Sawae, mentioned later, so he was acquainted with the two (though at the time, he had a completely different cute appearance, and because he grew rapidly into his current form, neither Takafumi nor Sawae recognized him as Chiaki at first glance. Also, regarding Takafumi, he himself has changed quite a bit in appearance since then, so Chiaki didn't recognize him at first either).

He is also a YouTuber, and with a pure intention to entertain his viewers, he uploads videos and discusses ideas with Uncle.