Technically those creatures are apart of a more advanced and generally different world. Basically since there not apart of the Chrystal Chronicles world there not generally acceptable. This is just to put things simply. please do not try to argue.

(geesh that's a bit stereotyped way of the creatures. yes they have Similar qualities, but they aren't those creatures..... ugh... ignore me... I love the game so I do take offense to calling the creatures unoriginal.) The Yukes are Spirits trapped inside a steel enforced body, It is said that they have no true body. yes there hands look like birds. but if you pay attention, there more furry or clothe like. Of coarse the spirit thing is a myth but that's what most of the species say about the yukes. (you almost sound like you've never played the game...) Also you could be a moogle or any creature from the crystal chronicle games if you don't want to be a Clavat, Silkie, Lilty, or Yuke. But I'm looking for a Crystal Chronicles rp, not just Final Fantasy. Also there is multiple options when you are one of the four creatures, you could look almost any way you see fit as long as it's in the parameters of the creature.