Nope, sorry.

The riddle:
My calling now is not too far from what it was before
though I don't play with you much, friends and peers, not anymore
I am tired, weary; Do I even still exist?
I can't feel my limbs, but through my work I will persist!
Though short, unknown and ugly may all well be in command
they do not see how they are mere puppets under my hand

Incorrect answers:
Black Mage(s)
Kuja
Vivi
Genomes
Garland
Necron
Cid
The game
Steiner
Lav Layderce
Queen Brahne
Queen Stella
The pointer
Master Phantom
The player
Black Waltz #3
The Nero brothers
Moogles
The Crystal
Gilgamesh

Hints:
The answer is a person.
The answer exists in the game's world, i.e. it's not something the player could be aware of but not the characters.
"Short, unknown and ugly" refers to Regent Cid, the King of Burmecia and Queen Brahne.
The first two lines contains references to a previous Final Fantasy.