Li Shenron
Legend
Ok sorry this took a few days, but here's an update.
I sat down and talked with my player regarding how simply not telling me his backstory after I had specifically told people it was tied into certain things they could take (ie what languages they have) was not ok for my game, and he explained to me that he had refused because he wanted his character's story to exist in a vacuum independent of the campaign.
Long story short I agreed to not develop his character's story through plot looks and side quests, and he will be sending me a copy of said story at some point in the new future. Now it's just down to waiting and seeing if he actually follows through on his half of the deal.
Ok, good luck!
Tho I have to say that this stinks. Not because of your decision, but because of his premise. Having a character whose story "exists in a vacuum" is nonsense to me. It's like having a movie, where one of the characters simply isn't part of the story, but it's still there. If he is not part of the story, he is part of the furniture? If he has a fantasy about some imaginary character, but want to keep it outside the story of the game, then he can keep it for himself, write up such character using the rules, print the character sheet, and post it on his bedroom wall. Why does he need an actual ongoing game and gaming group around that?