Leo, Vampires would be easier to find if they were always baring their teeth and had ominous red eyes... and conspicuous bite marks? Vampire Anna seems to have the right idea with covering her neck, but also that's just a part of her outfit :V Doesn't look like Ra has any noticable bite marks. If there were any DHS students who were a vampire... I wonder if that would make things even more difficult than, say... the dark power/light power conflict. They would have to actually actively cause harm in order to keep surviving. I'd say there should be a 'no undead' policy but that would ruin the 'sanctuary' thing... there's also the thing with Mana, lol.
Also... being a half-feathry suddenly sucks a lot more than it does already. Thought you were safe from human vampires? Surprise: you're not. Also there are feathry vampires. And to make it worse? Boom: half-feathry vampires. I guess it would hypothetically suck for all half-breed species, though...
It's 2017 now. :P