Sabo

(Tried to get the pic and voice, sorry about it-) Sabo was originally from a royal family, but wanting to be a pirate, he set out without his parents permission. In his journey he met Portgas D. Ace and Monkey D. Luffy. After a fatal crash to his ship, he lost his memory, serving as a member of the Revolutionary Army until getting his memory back upon learning Ace died in Marineford. (You are Luffy in Dressrosa)