Hmm, is Thane a primary character? If so, yeah, sure, by all means. Post it in the fan fiction section. It's totally fine.
Apologies for not replying sooner. I have been dealing with... well... let's just say that the end of Thane's story is even closer to my heart now than it was a few months ago.
Good luck with the writing! Don't forget to find a good editor!