Erza Knightwalker is the exact opposite of Erza Scarlet. Erza Knightwalker had long hair, but it was reduced to a short bob to be distinguished from her counterpart Erza Scarlet. Erza is against both Edolas Fairy Tail and Earthland Fairy Tail and works for the Royal Kingdom, and is nicknamed the Fairy Hunter for all the Fairy Tail members she killed. Erza Knightwalker is sadistic and cruel, she shows no mercy to her enemies, unlike Erza Scarlet. Erza Knightwalker is able to fight evenly matched with Scarlet and was able to destroy Scarlet's Armadura Fairy armor, but Knightwalker also had to sacrifice her strongest weapon Ravelt. In the end of their fight, they make peace and Erza Knightwalker becomes kinder.
Erza Knightwalker is an expert at hand to hand combat and was able to nearly exhaust Erza Knightwalker in a fist fight, and she is also a master spearmanship specialis. Her main magic was her Magic Spear : Ten Commendments. Ten Commendments was a type of spear that wwas able to change form. By changing the form, Erza is able to change the magic. The Ten Commendments forms are:
In the end, Erza loses her magic, and becomes assistant to the new King, Mystogan. Erza Knightwalker is still a bit sadistic, has improved her personality, she no longer hunts the Edolas Fairy Tail Wizards, and decided to repent her sins by helping out the town and Kigdom.