Rosalin

Rosalin was the last Demon Monarch and the final demon to possess the Origin core. She engaged in a life-or-death battle with the Zeroth Commander of the Sentinels of Humanity, a battle which ended in both of their deaths. Following her death, the Origin was split in two, with only one half being recovered.

She had a human husband with whom she bore a single daughter. She was raised by Claudius as his adopted daughter, who is currently traveling alongside her granddaughter, her only surviving descendant.

Appearance
Rosalin was a tall, curvy young woman with snow white skin and red markings on her face and shoulders. She had sharp fangs and red nails. She had silver eyes with red slit pupils and white hair with a red underside reaching down to the ground, a braided strand worn across the top of her head like a headband.

She wore a short, white turtleneck dress with a red ruffle lined interior and cold-shoulder sleeves reaching past her hands, nearly brushing the ground. She added white, thigh-high stirrup socks and a silver serpent earring wound around her left ear, decorated with a dangling red gem.

Abilities
Blood Magic: Her magic gave her complete control over her blood, and thereby her own body. She was able to use it to attack when injured, giving her a surprise leg up against her opponent, or even boost her physical strength by increasing her blood flow. She could also inject her own blood into someone else's body, effectively creating marionettes out of them whether they were alive or dead. In her final battle, she ended it in a draw by making her blood explode outward with immense force, killing both her and her opponent.

Demon Monarch: As the Demon Monarch, Rosalin reigned above all of demonkind. She had the ability to affect and control demons, able to give them commands which they were forced to obey no matter what it entailed. Even her mere presence was enough to cause demons to treat her with reverence and listen to her words without argument. She could also affect humans to a certain degree, exuding a menacing aura that kept most from even approaching her.