Gaku Honda is the younger, self-dependent brother of the main protagonist, Subaru Honda. He's usually very level-headed but is quick to snap on people depending on the situation. He doesn't want nor need anybody's help and is determined to fix most of his issues on his own. He lives in the basement of his house, where he, on occasion, loves to build various contraptions.

He's always worried for his older brother, even when they don't exactly see "eye to eye"

I would like for Gaku to sound similar to Zatch from Zatch Bell, or Jimmy from Jimmy Neutron-! (Both played by Debi Derryberry)