I think its funny that these days Aries is known as Arieth. _____ Except you spelled her name wrong twice Aeris/Aerith :/<<< Her name causes so much confusion but I think I've got it. AeriS is for Japan and AeriTH is for the English translation.
(I love how lightning looks here. Also love that she has the same voice character as Liara T'soni!) Lightning (Final Fantasy XIII) - The Final Fantasy Wiki has more Final Fantasy information than Cid could research