Twoey is a monstrous succubus with two (main) bodies and one mind. Her default form is a fusion of both bodies, but she can separate them at will and control them independently. She has a number of other powers, such as self-cloning, teleportation, hypnosis, and manipulation of her flesh. Her true name is unpronounceable by humans, so she goes by Twoey for convenience.

As a succubus, Twoey feeds off of the sexual desire humans exude during intercourse to survive. Twoey is efficient, meticulous, and cunning - presenting herself as a business and treating her victims like clientele. She subtly scatters means of contacting her in places all around the world, and once summoned, lulls them in with sweet, sensible words... but once she's got you, she'll never let go.

Victims of Twoey become infatuated with her after first contact, and from then on will continue to seek out her services. Each time she visits a person they continuously become more and more obsessed with her. Twoey uses this to her advantage, carefully manipulating them into cutting off their friends and family until the victim is completely isolated and dependent solely on her. With each visit she feeds off of more of their desire, their mind, and their flesh - until they are wholly consumed by her.