Villain?

 
Orpheus of the Lyre Let's Talk ! — Prepare to scream !

Sally, why didn't I listen to you?

If i recall from the movie correctly the mirror is neutral not a villian he answers whoever asks him a question he's not on one side or another
 
Unbirth Discussion — Et moi, Jack, L'EPOUVANTAIL !

Ils me trouvent génial, mes mauvais tours les émerveillent, tous les ans c'est le triomphe et la gloire.

We don't know wich role it'll have in the game, maybe it'll show loyalty to the evil queen.
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Nitrous X Merry Christmas! — I have identified the scent. It is...Christmas!

"When did that happen? You were always terrified of Santa before-"

Woah, Jack Skellington mania. Well, considering he serves the evil queen (the Antagonist of Dwarf Woodlands) and the fact that he fights at least 2 out of the 3 trio of BBS Keybearers, I'm guessing that he is an Antagonist.

Name

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Kingdom Hearts Fan
TALK - It was the natural thing to do...
if i remember correctly in a latest vjump scan he is called man in the mirror?
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LotsoBearLover -  Welcome to sunnyside!
TALK - You've got a playdate with destiny!"
  I thoguht that is what the battle is called?

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Eternal Nothingness XIII -   You have to be strong. Strength of heart will carry you through the hardest of trials.
TALK - What I do, I do for friendship. — 21:12, September 19, 2009 (UTC)
 It is the Magic Mirror. What the mirror is in the story, is a soul trapped in the mirror. The soul of a man...but there is no mention whatsoever of this name.