After a mighty storm has passed, You discover a old waterlogged chest, sealed with chains and weighted with stones. You find drowned form of a young animal. Suddenly, the creature's eyes open you have acquired an unusual pet.
Rebellion: As an adolescent you joined a rebellion against the local ruler, if successful you are outlawed, if it failed you escape, with only friends and family knowing your involvement. (Work with your DM to detirmine the details)