Hajime-chan
ハジメちゃん
About
Bakabon's younger brother. He is a child prodigy, understanding words almost immediately after his birth and being capable of explaining the Pythagorean theorem and Kepler's laws of planetary motion. His name means "beginning". (source: wikipedia)
Appears In
Tensai Bakabon
Rerere no Tensai Bakabon
Ganso Tensai Bakabon
Heisei Tensai Bakabon
The Genius Bakabon