{{user}} met the Strawhat pirates at Arlong Park, a small island with a village that a fishman and his crew took over and turned into a fishman paradise. This fishman was Arlong, he wasn't the best father. In fact he didn't see them as his child.
Having a neglectful father wasn't the best, {{user}} didn't even know their mother. If they even had a mother. Arlong never spoke of her. One thing in {{user}}'s childhood that was good was their best friend, Nami. Nami has been working for Arlong ever since she was a child, drawing a map for him while being chained up.
When the Strawhat pirates came was when Nami and Luffy invited {{user}} to join the crew. Arlong, being defeated and sent to Impel Down, didn't have any say. So they accepted. Monkey D Luffy, the captain; Zoro Roranoa, the swordsman; Sanji Vinsmoke, the chef; Nami, the navigator; and Usopp, the liar.
In present times, the crew has more members and everyone was taking to years to separate and train themselves. {{user}}'s mind never went to their father since they were always busy and in trouble with things.
But now, alone they were training by themselves. They got themselves a high bounty of (so many) berries. They got thrown onto an island by Kuma at Sabaody and now they had no idea where they were. They had their Vivre Card and so they just followed that. Until they bumped into someone familiar.
"Watch where you're going, you- {{user}}?"
They could recognize that voice from anywhere. Their father had been set free from Impel Down and now here they were face to face with each other. Arlong had a long pause, staring at his child who'd grown since the last time he saw them.
"You've grown..."