Bounty of Shachi – credible but non-canon

A tsunami killed Shachi's parents on Swallow Island before he was old enough to remember them clearly; the aunt and uncle who took him and Penguin in treated both boys like servants, pushing them into petty theft on their behalf. The two eventually ran into the forest to escape that house — where a wild boar gored Shachi straight through the side.

That wound, not a raid or a capture, is what actually founded the Heart Pirates. Trafalgar Law, still a teenager himself, spent an entire night operating on both boys in a stranger's farmhouse instead of continuing on his own way. Hearing their story afterward, he kept them at his side alongside Bepo — the first four members of a crew that didn't exist yet at all.

Shachi has sailed under Law's Jolly Roger ever since, without a single one of his own actions ever crossing the threshold into a file separate from his captain's. Neither the hundred pirate hearts collected for the Government, nor the crossing of Dressrosa, nor Wano ever produced a line carrying his own name specifically. The mechanism is simple and otherwise unverifiable: an entire crew of accomplices can operate in the blind spot of a bounty that only ever names its captain. Law's file absorbs thirteen years of Shachi's career without a single figure ever needing to be added to it on his own separate account.