Carmilla

An ancient vampire who resides in the Castle of Chaythe, where Meier and Charlotte go in hopes that a still-functional ship can take them away from Earth. Many years earlier, Carmilla's blood lust had become so rampant that D's father, the Lord of Vampires, impaled her in her sleep, leaving her body to rot and her spirit imprisoned within her haunted castle.

http://myanimelist.net/character/17925/Carmilla