Bosao

Bosao is a child who was adopted by the Revolutionary Army and brought to Baltigo. He looks up to and tries to emulate Sabo.

"Bosao" is not his given name, but rather a nickname he's called by the protagonist of novel Straw Hat Stories chapter 7. She came up with the name by switching the syllables of Sabo around, due to Bosao's imitations of him.

Appearance
Bosao is described as being a young child who tries to emulate Sabo in appearance. He wears similar aviator goggles to Sabo's pair, though with one lens broken, and carries an iron pipe on his back, though it's described as being too long and hitting the floor.

Personality
Bosao is described as being a slightly annoying, if generally normal, child. He tries to imitate Sabo as much as he can, including in his personality, though he doesn't really succeed.

Abilities and Powers
Bosao tries to emulate Sabo's abilities, creating basic punching attacks with the same names. However, he is described as not being particularly strong, still being a child.

Past
At some point in the past, Bosao was adopted by the Revolutionary Army and brought to Baltigo.

During the Timeskip
Bosao bothers a young girl who's trying to become an archeologist, and attempts to get her to train despite her insistence that it's useless. She eventually tells him off with the help of Robin.