Valka

Valka is a strong, uncompromising vigilante who also turned out to be Hiccup's long lost mother and the wife of Stoick the Vast. After being taken by a dragon, the whole village of Berk presumed her to be dead. Valka, however, chose to stay away out of her own accord, believing her family would be better off without her. Nearly two decades later, she accidentally crosses paths with her son Hiccup during his journey to stop Drago Bludvist and finally reunites with her husband Stoick.