Yana Whitlock's Twin ??? Sister.

The thing that often strides alongside Yana and claims to be Yana Whitlock's twin sister calls itself Allura Whitlock, Often turning to violence when people scoff that they are twins. Like a mirror turned darkly that allowed an infernal version of Yana into the world, Allura is a Tiefling with decidedly succubi leaning looks. Anything but a figure that blends into a crowd. In a different world and time one might suggest she is Yana's ID.

Allura is often armored and armed though has displayed the capacity to wield magic. Though Yana's twin, she grew up with their mother a powerful wizard. Allura was meant to follow in her mother's footsteps. Word of her father's death and her twin sister's predicament changed things in Allura and lead to the monster that strides the world now. Without a doubt she loves her twin and defends her. The rest of the world could go to the nine hells as far as she is concerned and sometimes that is literal.