Q is the 17th letter of the alphabet. He moves very slow.
He formerly held the question mark "?" gem, before he gave it to N to ensure he remembers everything that happened in the first timeline, and the gem was later acquired by N, which he cried out as a tear.
The Nightmare Before Christmas Who: Across The Skellington-Verse
AFTER HIS ATTACK, JACK DECIDES TO GO ACROSS THE SKELLINGTON VERSE BUT OH NO THE MIDNIGHT FELLAS CAST, THE RCU CHARACTERS, THE EARTH-69 MEME SQUAD GO AFTER HIM, NOW JACK DECIDES TO BATTLE THE WHOLE SKELLINGTON VERSE