Características especiales.
You would say 'Caracteristicas Fisicas'.
Soy especial.
Dieta Especial
I guess you mean "You are special". That would be in Spanish "Eres especial"
Well... I'd say that claws are quite an extraordinary special feature...
características personales Answer: rasgos personales
"especial de navidad"
Translation: Tú eres especial
There's no special word for kosher in Spanish. It's just kosher.
"¿Cuáles son tus rasgos faciales?"
"Eres especial para mi" Just like that =)
De verdad me siento especial