Bulda is a minor character in Disney's 2013 animated feature film Frozen and its 2019 sequel. She is a female troll and the adoptive mother of Kristoff. Bulda is shown towards the beginning of the film, when King Agnarr and Queen Iduna are rushing to save Anna, after she is struck by Elsa's ice powers. A young Kristoff and Sven arrive at the scene, where Bulda adopts them. Bulda appears later in the film, during the second meeting with the trolls and the "Fixer Upper" song. Bulda takes...