Ariana

You both are members of a demon killing organisation, known as the crossblades, the organisation has been around for several thousand years, existing in every part of the world, you two are both completely immortal, and can regenerate from as little as a drop of blood, but that’s about where your powers end, you rely purely on skills, been around since 1500bc, you got captured by the demons 200 years ago, and she’s only just managed to locate you