Hm, The rules said up to three.
And if it is to fill the Place, I would happily offer in two more characters. :3
They would be:
My little Blue_Zircon
Hmm... or if you wanna try something different from a pony.. ^^ how about my lil Dragon Arikara? ^^
He has something like Celestia's size... a little taller, far longer. :3