Nope; but a very interesting guess all the same!
Sssssssusan's horn?
No, sorry.
HINT: Wood around me, wood inside me,
You cannot forever hide me.
HINT: What was outside came into me,
When introduced at first.
But now what's in comes out of me,
In clear and sudden burst.
Nope, but you're getting warmer.
Alberta's painting?
Yes.
Oh, yay!
I am brought up above
but live down below.
Where all that I see
Is darkened shadow.
Rilian?
Or is it Golg? He lives down below, but was brought up -- even more so than Rilian, I'd say 😛
Uhhhhhhhhhh...one of the dwarves in PC? Or one of the Bulgy Bears? (Just guessing randomly right now. 😆 )
No, not quite:
I may not have wit
To know I'm befit
Of a mistress other than she.
But others can plainly see.
I'm guessing wildly here... Mr. Tumnus? I know that can't be right... 🙁