Deleting Cata Char

I recently transferred my characters from Neltharion Cata to this Mop realm.

Now I want to make a new Character, but dont have any slots left in my account.

My question is, if I delete one of my Cata characters which I transferred to Frostwolf, I wont lose my original lvl 85 char on Neltharion right ? Incase i ever decide to transfer it again someday?

The character in neltharion does not suffer any change since you only copied that character to frostwolf. They are independent, but if you delete the transferred character to frostwolf you will not be able to transfer it again, it can only be transferred once from cataclysm to mop and from cataclysm to icecrown