The Red Court of Vampires is a breed of Vampires in the DF universe. In their true form they are rubbery-skinned bat-like creatures that hide themselves inside a 'people suit' or 'flesh mask' made of ectoplasm, usually appearing especially beautiful.
They are vulnerable to sunlight and holy objects held by people of faith, but not garlic or running water. Of note is that the armoured skin of their bodies is especially light over their bellies, and damage to this spot can puncture the blood sac that they use to hold the blood that fuels their powers.
In recent years, the Red Court was utterly destroyed by a hijacked ritual in Chichen Itza. The human wizard Harry Dresden turned a ritual by the Red King against the Court and destroyed all vampires except those turned less than 20 seconds before the ritual's completion.