In a dark alley at night, you are attacked by thugs. Before they can take anything, they turn white with terror and run away. You discover that you have a guardian ghost, a wise, benign spirit who accompanies you (work with your DM to determine details)
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.
When you become an adult you learn to used a weapon (of your choice) appropriate for your culture and social standing. (work with your DM to determine details)