Vampire who assassinated Hyakuya agents

This vampire slaughters a gathering of agents in the Seraph of the End: Guren Ichinose: Catastrophe at Sixteen manga. Upon spotting Guren Ichinose and Shinya Hīragi she heads to deal with the witnesses.

Appearance
She had a voluminous amount of long hair that reaches down to her back. With sections on the sides of her head too, the left part is held together by a decorative ribbon. Her ears are kept visible which are pierced with a dark colored earring. Her fringe is parted to keep what would be her vampire red eyes visible.

For clothing the vampire wore a short skirt, with a frilly section underneath. From underneath her skirt, a strap section becomes part of the long tights reaching her mid-thighs. These are within a pair of cuffed boots. A long white cape reaches down to the back of her legs, with a smaller cape over that around her shoulders. At the front, the cape is tied around her front with the straps wrapped into a bow.

Personality
Taking time to look at Guren with it clear she had all the control, the vampire also appeared quite pleased to chase them. She also appeared satisfied seeing that she has caught Guren’s sword. Surprise was shown at being struck with a dark energy, where she had a curious sense of bafflement at the scene of her arm having been splintered. She would survey that rather than give further chase.

History
Being a vampire, at one point she would have been a human who received a vampire's blood and was transformed. Her age could be ancient, and regardless of how she lived as a vampire at some point through her own initiative or acting through others she would involve herself in human affairs.

Story
With the four agents stirred, she initiates the conflict by striking one of their heads off before landing near the other three. With her back to the chains fired at her, she leaps backwards to avoid their collective strike and lands on the shoulders of one of the men. Grasping his head, she springs upwards taking it with her and after running along the chains she does the same by taking a hold of an agents head to essentially pull it off. Racing to the final member, she opens her mouth wide. Holding him while drinking from his neck, once he lies on the ground with the others, the vampires turns to Guren and Shinya where she is being observed from a tree some distance away. Licking her lips, she appears before them in the road. After Guren drives his motorbike into her, she has seized the front wheel and after sending him backwards she hurls the bike at him. Avoiding spell tag explosions, she runs after them when Shinya is driving at a speed of 100kph. Ready to leap, she has her right hand prepared to strike. After Guren swings his sword at her, she is able to grab the blade and snickers at this turn of events. When Guren emits a shadowy energy, she is surprised and attempts to shield herself, before glancing to her arm having been cut in half. Landing, she abandons the chase and surveys her limb. After Shinya and Guren have driven away some distance she remains standing in the road.

Weapons

 * Even though fighting against competent agents wielding enhanced modified weaponry, she used her hands to deal with them.