Laura

Laura is an anime-only baobhan sith who infiltrated the Hellsing Organization and tried to turn Integra Hellsing into a ghoul. Apparently possessing great hypnotic powers, she got in without suspicion by mentally convincing everyone (except Alucard and Seras Victoria) that she was Integra's nonexistant sister. In what is widely considered the most risqué scene in the series, she paralyzes, partially undresses, and bites Integra on her breast. Integra realizes then that she has no sister, and that the girl must have tricked her. Laura then stabs Integra in the stomach with a knife to begin drinking her blood, but is soon dispatched by Alucard, who'd been delayed in an encounter with Incognito.

Personality
Laura is able to manipulate and easily trick people through a powerful type of hypnosis. She seems to be calm and stoic, as well at being deceiving. She easily tricked Integra into believing she was her sister (who doesn't exist). She seems quite risqué in behaviour. One example is Integra. After partially undressing a paralyzed/hypnotized Integra, she seemed to be somewhat seducting her by biting and licking her breast.

Appearance
Laura is shown as a young vampire/baobhan sith with long blonde hair and pale blue eyes. Like most vampires she has pale and also red dots on her forehead and a red earring. And like all vampires she has fangs that are sharp enough to puncture the flesh of their prey. She also wears a green outfit.

Abilities
Laura has the unique ability of hypnosis. She can control people and make them bend to her will. She's also skilled in deception. With the help of her hypnotic powers, she deceived Hellsing officers, Walter and even Sir Integra herself into believing she was her none existent sister. However, her abilities have no effect on vampires, as she can only use it on living humans.

The text of the English dub is somewhat confusing, probably due to nonrecognition of the term "baobhan sith" (especially when rendered by a Japanese speaker). The original script is clearer: Laura took her name from the novel Carmilla (which, like Dracula, may be close to the truth in the history of the Hellsing world), but Integra also addresses her as a baobhan sith. Upon realizing her identity, Integra refers to the baobhan sith as the Countess Karnstein, this being another reference to the classic vampire novel Carmilla.

A baobhan sith is a Scottish folk creature, a female vampire in a green dress and with very pale skin. It is pronounced "baa-van-shee." In the Japanese version of the anime, this got rendered as "Buubanshii", which is part of the source for the confusion on her name.