Well,I am not yet 100% sure,but these must be Harpyes (Άρπυιες in greek),creattures
that were half women and half birds...in a monstrous forn of cource.They normallly appear only in the Argonautic mythological cyrcle,but since it is Holywood,you never know what to expect!
As for the Kraken-which is scandinavian,by the way-doesn't it seem like a comdination of an Olog-hai and the Guard of the Gate in Siranon?