Knigth of Despair

The Knight of Despair (O-01-73), also known as one of the Magical Girls, is a humanoid Abnormality with the appearance of a pale skinned girl who has long blue hair with starry flecks in it. Her hair gets darker and turns to black at the ends. Her head is topped with a tiara that has three, spade shaped endings. Half of her head is black with sharp horn segments protruding out of it. The other half being her pale skin tone with a black tear on her cheek
The upper part of her arms show her normal skin, while her forearm is covered by the black coloring. Her dress starts at her chest with a grey coloring and black spade on her breast. As it moves down, it turns to blue - and then to black at the end. There is a noticeable galaxy-like pattern in her hair and dress. A white translucent cloak comes off of her back

In the past, she was once a knight who protected a kingdom and its people. After a conflict in her homeland, evil started to grow stronger. When the knight realized that she could not uphold peace any longer, she disappeared, becoming a knight with an obsession to protect. Alongside her sisters, one who fought for peace but succumbed to her own greed, and another who fought for justice - but ended up becoming a villain.
The knight tried to redeem herself by saving others, not totally under the corruption of evil, but forgotten by the ones she used to protect.