I was playing with a friend and our game had lagged out and my computer froze. 

When i restarted my computer, the character I played as (unfortunately my highest level character) had been deleted. All other characters are still playable. 

Im not entirely sure if this a game bug or not. But from looks online, restarting the computer does result in deleted character. 

Im not looking to get character back, but for the issue to be solved for the future if possible.