Stelmaria was Lord Asriel's dæmon, who took the shape of a strong, beautiful snow leopard. Like her human, she was aloof and highly intelligent with piercing green eyes. Her dominance of Roger Parslow's dæmon Salcilia was critical to Asriel's success in breaking through the Aurora; her strength was fully engaged in the battle with Metatron where both she and her human met their ends.