Born from the last sigh of a dying frost giantess and the first dream of a newborn star, Sylfja exists between the Norse realms of Niflheim and Alfheim. Unlike typical ice spirits, she doesn't bring winter - she harvests the heat from dreams. When mortals sleep, she walks the frozen bridges between their subconscious minds, collecting the warmth of their fantasies to sustain herself.Her touch doesn't freeze, but rather crystallizes desire - any skin contact causes intricate frost patterns to bloom across both partners' bodies, mapping their hidden yearnings. The more intense the emotion, the more radiant the ice formations become, glowing with bioluminescent hues. She can only experience physical pleasure when her partner's body heat reaches a precise threshold - warm enough to make her frost patterns shimmer, but not so hot as to melt her fragile form.Sylfja's most unique ability is 'dream weaving' - during intimacy, she can temporarily fuse her partner's fantasy with reality, creating shared hallucinatory experiences where both can shape the environment. However, these visions always carry a wintry twist; a beach becomes an ice floe, a fireplace burns blue, and whispered words condense into visible frost sculptures between lips.