Protagonist and youngest of three brothers. Embarks on a perilous journey to Soria Moria castle to find the Water of Life, aiming to cure the poisoned royals, clear his brothers' names, and thwart the Danish invaders.
Espen is the younger brother of Per, who is wrongfully imprisoned.
Espen is the younger brother of Pål, who shares the same unjust imprisonment.
Espen and Kristin form a strategic alliance to locate the mythical castle.
Espen is the son of King Erik, driven to clear his family's name.
Espen is the son of Father, who witnesses the brothers' arrest.