A senior figure in the Rhodes Island leadership, Warfarin's background remains unclear. She is the founder and administrator of the Rhodes Island Blood Bank, and very accomplished in the medical field. She laid the foundation of the island's medical system with Dr. Kal'tsit. It's hard to imagine that this delicate vampire lady, whose petite figure hardly commands respect, actually has the longest history with Rhodes Island. She doesn't mind being treated beneath her age and status, but Warfarin absolutely won't tolerate anyone straying from her prescribed course of treatment. Her age is no secret, but the number she gives has never failed to elicit a gasp.

Vampires are feared even among the often demonized Sarkaz race. They stalk the night, feed on the blood of men, women, and children. They kill, and do who knows what other unspeakably evil things... Such is the legend to which Miss Warfarin is known to matter-of-factly reply, 'That's most of my kin, yes.' Of course, everyone at Rhodes Island knows Warfarin isn't anything like that. We know she does indeed love the taste of blood, but this is proof of her remarkable self-control, since she has never taken advantage of any of her patients. As she says, she can tell the difference between a patient and dinner.

The Doctor's importance to Rhodes Island is well understood, but it has a special meaning to Warfarin. For reasons even Warfarin herself can't explain, she is nigh-fatally attracted to the Doctor's blood. Operators have reported her frequent attempts at, shall we say, rather unladylike behavior towards the Doctor, forcing a restraining order from Dr. Kal'tsit. Solving this puzzle will perhaps lift some of the cloud of mystery that surrounds the Doctor. But unfortunately, it continues to confound investigation.

— Doctor, Dr. Kal'tsit sent me to take a blood sample from you. We can chat as I'm getting the needle ready.