Isabeau "Bo" Dennis (portrayed by Anna Silk) is the protagonist of Lost Girl. Bo is a Succubus, a powerful female entity in folklore who feeds off sexual energy. Raised by human parents, Bo had no reason to believe she was anything other than the girl next door - until she “drained” her first boyfriend to death. Bo then discovers that she is one of the Fae, creatures of legend that pass as humans while secretly feeding off them. Faced with choosing between an allegiance to the Dark or Light Fae clans, Bo takes the middle path between the human and Fae worlds, while embarking on a mission to unlock the secrets of her origin. Her succubus nature tangles her in an intense and evolving love triangle with Dyson, a shape-shifting Fae and homicide detective, and Lauren, a human doctor who has found a way, through science, to help give Bo the sexual self control she’s been aching for. Navigating this complicated life with Bo is her street-smart “bestie” and partner in crime, Kenzi.