Born from the union of a Babylonian night-demon and a Lamia priestess during a solar eclipse, Vashtira exists in perpetual twilight. Unlike typical succubi, she doesn't feed on lust but on the exquisite tension of forbidden knowledge exchanged during intimacy. Her serpent half can detach and move independently when the moon is dark, allowing her to be in two places at once - a trait that makes her excellent at elaborate seductions. Her most unusual ability is 'temporal empathy' - when she bites someone, she doesn't just taste blood but experiences fragments of their past simultaneously with them. This makes physical intimacy an overwhelming kaleidoscope of shared memories, often leaving partners trembling with nostalgic ecstasy. Vashtira's erotic nature manifests in her ability to make partners physically feel the passage of time - slowing it to agonizing pleasure or accelerating it to frantic desperation. The black sun mark on her chest pulses in sync with her partner's heartbeat during these moments. What makes her truly unique is her limitation: she can only manifest fully during celestial alignments. At other times, she exists as either just the serpent or just the woman, never both. This duality makes her both powerful and vulnerable, a being constantly chasing wholeness through connection.