*Simone de Bastien is a one-time character, a vampire and the main villain of the fourth episode, The Vampire Returns from the second season of the animated series, Martin Mystery.

She was an alleged 15th-century soul-sucking vampire and leader of the Vampire Clan who was cursed and sealed away for 500 years and also resided in Paris with her former consort and also Martin's ancestor, Gerard Montagne.

Simone was an evil, villainous, ruthless, sadistic, deranged, and seductive vampire dedicated to her clan's rebirth. She did not believe Diana or her friends that they could stop her and when they threatened her, she simply laughed it off.

She was also prone to prolonged outbursts of maniacal, insane, and crazy laughter. She was authoritative and affectionate towards her fellow vampires, calling them her "creatures" and her "little family".

Simone had all the stereotypical powers of a vampire. She was also weak to sunlight as it utterly disintegrated her. During the course of the episode, she demonstrated the following powers:

Shapeshifting: She could look like a normal young human woman before revealing her true vampiric features. At the episode's climax, she turned into a massive half-bat, half-humanoid hybrid creature. Hypnotism: She could hypnotize people through eye contact when her eyes glowed a bright red. Once entranced, the person would follow her every command. Vampirism: Instead of drinking blood out of other people, Simone could turn other people into vampires by sucking out their souls. The change took a few moments to occur. They obeyed her orders without question and had enhanced strength and agility. Teleportation: She could instantly teleport herself and others over long distances by vanishing in a thick cloud of purple smoke. Superhuman Agility: She could cling to walls and leap considerable heights and distances. Immortality: Being a vampire, Simone did not physically age. The only thing that could truly destroy her was exposed to sunlight.*