Sorry about that
@Vertigo, Um, not much to say really. Atanase is monster hunter all around, though he specializes in Lycanthropes and Vampires. He's extremely reclusive, the group would have hardly conversed with him even after two years. All of which is due to a traumatic event in which his twin was killed by a rogued member of their Bloodhunter order. Atanase is not even of this plane actually as he hails from Ravenloft. Anyways, I think the best way the two could interact is either they met hunting the same creature or yours was drawn to his sister's spirit which haunts him.