Ikaruga

Ikaruga is a member of the Trinity Raven, a group commanded by Jellal from Death's Head Caucus. Her appearance is roughly that of a geisha though her power are more in line with that of a samurai. She confronted Shou as he tried to escape from the Tower of Paradise with Erza (who was in card form at the moment) and attacked them out of nowhere. Luckily her attacks distorted the power around the card holding Erza, allowing Erza to escape and confront Ikaruga. Erza used all type of her armors against her but each was cut to pieces by Ikaruga's blade. Eventually Erza was only down to a pair of pants around her waist and cloth around her upper body. Ikaruga thought of it as an easy win, and the two attacked one another. However much to her surprise Erza was able to deal a mortal blow and defeats her.

While their fates were not shown in the manga. In the anime she and other members of Trinity Raven managed to fly away from Tower of Heaven.

Magic and Abilities
Ikaruga's power lays solely in her swordplay in a fighting style called Form of the Moonless Sky (無月流 Mugetsu-Ryu) that allows her to cut through nearly anything with one of her attacks. Her power was enough to overwhelm S-Class mage Erza Scarlet and destroy several of her most powerful armors, through this it is safe to say she is on par with Erza


 * Yasha's Empty Flash (Yasha Senkuu): One of Ikuruga's strongest techniques, she is able to slash whatever she is attacking without touching it with the blade, shattering even magical armor or weapons with one attack.
 * Garuda Flame (ガルーダ炎Garūda-en): A techniques that creates fire from the blade that attacks the opponent, it has the same properties as Yaksha's Empty Flash, and was powerful enough to destroy Erza Scarlet's Flame Emperor Armor.