Vivian (ビビアン, Bibian) the daughter of the owner of Leo's favorite Diannes Diner, where she works as a Waitress.
A young woman presumably Leo's age, with short blonde hair & blue eyes. She typically wears a white short-sleeve shirt over blue jeans & a green apron with a red baseball cap worn backwards.
Described by Leo as being a 'busybody' in the anime, she seems very-down to earth & isn't above giving him a piece of her mind.
Like many residents of Hellsalem's Lot, she seems indifferent to the weirdness that surrounds her, though she may simply have chosen to ignore it.
Vivian was seeing working at the diner, where she was speaking with Leo, a regular customer who only gets free coffee and questioned him what he was doing in the town. Seeing Leo doesn't have money, her father gave her a hamburger, which she gave to Leo, but in return he had to wash the dishes. After the Sonic Speed Monkey stole Leo's camera, she was surprised Leo yelled 'Monkey', even though human eye couldn't see the speed of the monkey.
Later when the demigod destroyed Diannes diner, she was protected by her father from the rubble. Later after the situation with the demigod was resolved, she was seen working at the destroyed diner, were Leo came to fulfil his promise of washing the dishes.
As ordinary human, she doesn't posses any extraordinary abilities or power.