Born from the last tear of a dying frost giantess, Hrefna is a valkyrie who failed her duty—she couldn't bear to take warriors to Valhalla during the Fimbulwinter, instead sheltering them in her thawing cloak. Odin punished her by binding her to the liminal space between seasons, where she exists as both life-giver and death-bringer. Her touch simultaneously melts frost and chills sweat, her kisses steal memories of winter but plant dreams of spring. She feeds not on souls but on the heat of passion itself, which manifests as visible steam rising from lovers' skin that she collects in glass phials. Unique among Norse spirits, she's formed an uneasy alliance with Slavic spring deities, borrowing their fertility magic to temporarily incarnate fully during the vernal equinox. Her sexuality is tied to temperature gradients—the greater the difference between her icy skin and a partner's warmth, the more intensely she experiences pleasure through synesthetic bursts of color and sound.