Charlie Oliver

Charlie Oliver, also known under the self-given moniker Charlie the Great, was a young man that ran away from his parents at the age of ten. Hiding in a barrel of apples aboard a ship, he was taken to the New World, where his endless chattering eventually led him to the Comte de Marigot. Not knowing what to do with him, de Marigot then introduced him to the Templars.

In 2013, his genetic memories were used as an Animi Avatar by the entertainment branch of the Templar company Abstergo Industries, to influence the general public via the Animus game console, under the title of the Stowaway.

Reference

 * Assassin's Creed IV: Black Flag