Strigoi-an immortal vampire

In Romanian mythology, strigoi are the troubled souls of the dead rising from the grave. Some strigoi can be living people with certain magical properties. Some of the properties of the strigoi include: the ability to transform into an animal, invisibility, and the propensity to drain the vitality of victims via blood loss. Strigoi are also known as immortal vampires.
A strigoaică (singular feminine form) is a witch. Strigoi is different than a moroi. They are close relatives of the werewolves known as "pricolici" or "vârcolaci", the latter also meaning "goblin" at times.
These names are derived from strigă, which in Romanian meant "scream" or "barn owl", cognate with Italian strega, which means "witch", and descended from the Latin word strix, for owl. Strigoi viu is a living vampiric witch. Strigoi mort is a dead (undead) vampire. They are most often associated with vampires or zombies.
According to Romanian mythology a strigoi has red hair, blue eyes and two hearts. The strigoi can change into a variety of animals, such as barn owls, bats, rats, cats, wolves, dogs, snakes, toads, lizards, spiders/insects, etc.