She is smart, strong resourceful ER doctor – and the last living werewolf of her line. She’s also openly bisexual. After the rest of her family was hunted to extinction, she went into hiding and since then she’s deliberately avoided getting too close to anyone. She lives in fear of being discovered by the wrong people and has no idea that she’s currently on a collision course with the Mikaelsons.
Prior to 2014, while she is well into her medical education and just starting her residency, her family and werewolf bloodline were hunted down by Lucien. Once he obtained the venom he needed they were killed off. It remains unknown how she survived her family's destruction though it is likely because she does not share her grandmother's maiden name of Malraux.
Throughout The Originals Series
In Gather Up the Killers, Hayley sought her out because she was the last of the Malraux bloodline. After she was kidnapped by Hayley, she agreed to give her the venom she needed in exchange for her freedom, though after Freya was awakened and she healed her siblings, she remained a captive as Freya could only make two doses of the cure.
Powers and Abilities
Keelin possesses all the standard powers and abilities of a non evolved-werewolf.
Keelin has the typical weaknesses of a non evolved-werewolf.
- Keelin is a Celtic name and means "slender" or "comely". 
- She is the third LGBT character who appeared in The Originals after Josh Rosza and Aiden and seventh in The Vampire Diaries/The Originals universe after Bill Forbes, Luke Parker, Mary Louise and Nora Hildegard.
- Her grandmother's maiden name is Malraux.
- In No Quarter, Sofya confirms that she is the last of the Malraux bloodline.