Fuyu no Megami

Winter Goddess is one of the old gods of Winter and Death. The Winter Goddess is first mentioned just before the night of Yule, an important cycle of the year that showcases the shift between the winter and the coming spring, by the Heralds of Yule and later by Elias. The Winter Goddess later seen riding on top of another god, it's revealed that she's pregnant as she unknowingly passes by Elias, Chise and Ruth. Before leaving she takes notice and picks up a mistletoe. The Winter Goddess later appears again before Ruth as he searches for Chise, being first mistaken to be the Slay Vega before Ruth gets a closer look at her and sees a resemblance between her and the Winter Goddess from earlier, quickly deducing that this must be her daughter. The Winter Goddess learns that Ruth had offered gifts to her mother, the mistletoe, and as thanks, she decides to help him by lending Ruth her "flame", which reveals Elias position to him. Ruth says thank you before leaving to find Chise, the Winter Goddess replies only that next winter, when she's her mother, she asks only for that which Ruth offered her then. As the mother, the Winter Goddess is a tall woman with exceptionally long, dark and wavy hair with a motherly figure. Her eyes are bright with white pupils. She's clad in a long dress that reaches down to her feet, it's black from the ankles and upwards while the lower parts are white. As the daughter, her appearance takes a stark contrast to her mother as she's a small child with white hair and a shorter dress. Her eyes have a black sclera while her iris remains bright and the pupils are white. (Source: Mahou Tsukai no Yome Wiki)