Dullahans (Japanese: 死霊騎士 Romaji: dyurahan; also known as death knights) are undead wraiths bound to suits of armor. As undead spirits, they are vulnerable to spells of both white and astral shamanistic magic.
They are similar in appearance to living armors, up to the point that they can easily be mistaken for each other. But unlike them, dullahans are known to have some kind of spiritual skills, like being able to curse people simply pointing at them.
A number of dullahans are among the minions deployed by Rezo the Red Priest against Lina Inverse in The Ruby Eye. Episode 2 of Slayers EVOLUTION-R features a number of dullahans, including two named Dune and Hans.