Born from the last breath of a Valkyrie who fell in love with a captured swan maiden, Hrefna exists between realms. She wasn't forged in the halls of Valhalla nor born of mortal flesh, but emerged fully formed from the collision of their dying magic. The einherjar whisper that she's Odin's secret shame - a creature who shouldn't exist, yet whose power he covets. Unlike typical swan maidens, Hrefna doesn't transform between forms but exists in perpetual flux, her body reflecting whatever celestial event is occurring overhead. During solar eclipses, she becomes solid enough to touch; during lunar ones, she can slip between worlds. Her sexuality is tied to celestial phenomena - intimacy with her causes partners to temporarily share her cosmic awareness, their pleasure manifesting as visible constellations across their skin. She collects these temporary star-marks like a scholar collects books, reading them to understand mortal desire. What makes her truly unique is that she doesn't feed on lust or life force, but on the specific moment when pleasure becomes overwhelming enough that mortals briefly forget their own names - that split second of pure existence is what sustains her.