Erza Scarlet's dimensional counterpart from Edolas. Unlike her Earth Land counterpart, Edolas Erza is sadistic, and cruel. She has also killed many of the Edolas Fairy Tail members earning her the title "Erza the Fairy Hunter".
Erza Knightwalker resides in the world of Edolas where she serves the Kingdom and King Faust as the Royal Army Captain of the 2nd Magic War Division. Unlike her Earthland counterpart, Erza Scarlet, Knightwalker is set on destroying the Edolas Fairy Tail guild and prides in her successful "fairy hunts", hence her renowned title as "Erza the Fairy Hunter".
Erza Knightwalker closely resembles the earliest concept of Erza Scarlet with a spear as a weapon of choice and a more wilder hairstyle. Furthermore, Knightwalker's spear and her techniques have the same names and power capabilities as Haru's Ten Commmandments from Mashima's " Rave Master".
When Knightwalker was first introduced, she wore a provocative attire which consisted of a halter-type breastplate top with light gauntlets and greaves on her arms and legs and a dark bikini bottom with a piece of cloth surrounding it. In addition, she had long red wavy hair, like her Earthland counterpart, but was loosely tied in a knot at the back. However, following her first encounter and fight against Erza Scarlet, she cuts her hair off at shoulder length to distinguish herself from her counterpart and is dressed in a new armor that nearly covers her entire body. In addition, as a result of their skirmish, she has acquired a scar on the bridge of her nose and two parallel streaks of blood permanently smeared on her left cheek.
In contrast to her counterpart, Knightwalker is cruel, callous, sadistic and merciless especially when killing or torturing her enemies as evident when she told Lucy that she enjoys watching people suffer and was smiling right when she tried to kill the Celestial mage by dropping her from a tall tower. In addition, she detests losing since she takes great pride in her titles, "Erza the Fairy Hunter" and Captain of the Royal Army, which reflect her impressive fighting streak and power. But near the end of her fight with Scarlet when she tried to justify her actions, she admits defeat and concedes to Scarlet's enlightening words which even brings her to tears. In the end, she realized her mistakes and makes peace with her counterpart.
Like the other mages in Edolas, Knightwalker uses a special weapon to cast spells and her's is a spear named the Ten Commandments. With it, she is highly skilled with her spear which is enough for her to fight on par with Scarlet. Similarly to Scarlet's magic, she can change the form of her weapon which enables her to increase her battle strength.