Parthinia Quell

Background
Parthinia and her Reavers are evil, plain and simple. She serves Charun, the demon prince of slaughter. She leads a tribe of monstrous humanoids, from mind-broken Orcs and Hobgoblins, to some undead minions, and many humans. She burns villages and salts the earth and corrupts it, making sure nothing grows where she attacked. She has a special love of butchering lovers of nature and the wild, and her war machines and artifice belches black smoke, and devours the natural world. She is only an issue in one of the part of the world so far, any many have not even heard of her, yet.

At some point, she met Lady Ada Mistborn and began a relationship with her. And in another instance, hired a Lich to work for her, his name being Vibaem, the Hollowed One. She also met with the Hunt Lords, granting them; through her Demon God, immortality by making them Wights for something unknown in return.

Interactions With Mystic Obscura
She murdered the tribe of Myastan Balasar, who returned to the tribe to find them either dead or enslaved. Escaping, Balasar has searched for her ever since, but has been unable to find her.

Parthinia was first seen by Adrie and Arannis, although neither party knew each other, crossing the grand bridge within Loudwater. Parthinia had arrived within the town to purchase a book about how to become a lich. She also had brought Myastan Balasar's clan with her, enslaving them as her protectors and guards. It is unknown how she reacted to Maximilian and the rest of Mystic Obscura buying the book before her and fleeing the city.

She also may have had a hand in creating another version of Arannis Galandal, as a dark, evil looking version was spotted by Adrie within the crowd, although it is unknown what his purpose was there.

Lady Ada Mistborn
At some point in time, Parthinia and Ada began a relationship, eventually creating a locket with the symbols 'P+A' to symbolize their love. They entered a marriage with Cassian, although it was unknown whether she was in love with him, or just to please Ada, who apparently was.