Guess it depends on whose memory we're talking about. I wouldn't know who remembers any of my older characters without me prompting them of it. 

So far as my memory, a character named Glyde would be the first one that I can remember the whens and wheres of his origins. He started as a Pokémon trainer in a more manga-inspired Pokémon RP (actual violence and such) in 2009. But that RP ended with little impact on his part, mostly because I was traveling when the RP concluded (in an age w/ out smartphones and data plans and wifi everywhere). Eventually I shifted gears and adapted him into Kingdom Hearts character, classing a sort of marksman-mage hybrid, which is the concept that has stuck with him through every following iteration.