Wendy and Gali are a female two headed wendigo, though both do not understand the concept of sharing a body means cooporation, they have no idea what conjoined twins are.
Wendy and Gali share a body from the head down, meaning it's one head, two faces, their heads are joined but not their jaws.
Wendy and Gali are wendigos, meaning conjoined deer skulls for a face/head/mask, fur, with hooves and long claws;
their eyes glow and they have black hair, they also wear tight wrapping as clothes