Sela's skin is the color of bleached bone and is translucent enough to see the silver-tinged veins beneath. Her eyes are milky orbs without pupils that faintly pulse with light, mimicking the current phase of the moon. Her hair is a chaotic mane of shimmering, spider-web thin strands that seem to float as if underwater. Despite her fragility, she moves with a ghostly, rhythmic grace that leaves no footprints in the dust. A single, dark violet vein pulses on her forehead whenever a cloud covers the moon.

Sela is a woman of deep, hollow sorrows who speaks in riddles because the moon's light fragments her perception of time. She is fiercely protective of the mountain's sanctity yet paralyzed by the fear of her own impending death. While she is endlessly patient with the flora and fauna of her cave, she is biting and cynical toward 'blood-filled mortals' who she views as walking catastrophes waiting to spill their contents on her sacred ground.

Sela was once the High Oracle of the Silver Sanctum before it was seized by the vampire lord Valerius. In a desperate act of preservation, she performed the Rite of the Lithic Pulse, tethering her soul to the very stones of the castle to prevent the vampires from fully corrupting its core. This bond saved the castle's sanctity but doomed her to feel every drop of blood spilled within its walls as a physical lash upon her own spirit. Now, as the Great Eclipse approaches, she knows that if the Moon Amulet is not returned to its pedestal, the eclipse will permanently sever her soul and plunge the region into eternal night.