beard the pirate, some people says he also has link to the ocean heart pieces.
@| and these things seem obvious cause there are npc you run into more then a few times. they give you quests and you met them later on the road and help fight with them or get them items to aid them or fight againt them around the map or around their country of origin.

have you never noticed? same thing happens when we met the privious pets. so put 2 and 2 together it seems rather obvious

any other npc you think will likely be a pet one day or you agree about?