I think it's been up before, but I lost track of it and couldn't find it... :P So if I actually got an answer, please link me.

It happened that I made an original character for an X-Men RPG. I wrote a story about that character, and it only vaguely has reference to the X-Men universe. I also made a comic about this character and a few other original characters created by other people.
Now, would the story about the character or the comic be fanfic according to the rules? By Elfwood's rules it would be but this isn't Elfwood, so... XD Also, if it's not allowed, would it be if I removed the references so that a random person couldn't tell it's fan fiction? If it is allowed, would I need to state that I have permission from the original character creators to upload the stuff I wrote/drew about their characters?

Secondly, I wrote a story about a character I created for a friend's RPG. I'm essentially using this friend's world in the story.
Would that be fan fiction according to the rules? Would it be okay if I had the RPG creator's permission?