Sea Empress Armor is Erza's armor that nullifies water attacks.
This armor was designed to nullify water magic and was first introduced in the S-Class Exams when she battled Juvia and Lisanna.
This armor has a color scheme of green, gray, and blue. She wears a helmet with fins at the sides, a shoulder guard with fins, green corset for her body that exposes her bosom, green gauntlets, and a bikini bottom.
Minor details include the placement of the chain. In the anime version, the chain connects the armor under her breasts while in the manga, it does not connect at all.