The Flickering Chronicles
Aged occultist, more concerned with research than fieldwork.
Hmmmmmmm . . . .
Arthas was never interested in slaying demons. He knows that demons are the keepers of knowledge, and that without a strong foundation of occult knowledge man can never hope to best demons. He recognizes the need for his fellow agents of the Lucifuge to literally give the devil his due, but Arthas is more than happy plowing through ancient texts while some other fool child of the devil risks their life to smite one more minuscule manifestation of malevolence.