The character Haleth in the anime film The Lord of the Rings: The War of the Rohirrim is depicted as the eldest son of Helm Hammerhand, the legendary ninth King of Rohan, and is the heir to the throne of Rohan. As a prince of the royal house, he represents the next generation of leadership for the Rohirrim, a people known for their horsemanship and martial valor.

In terms of personality and role, Haleth is portrayed as a strong and skilled fighter who shares his father’s courage and willingness to defend his homeland. When the armies of the Hill Tribes, led by the Dunlending warlord Wulf, bring ruin to Rohan, Haleth takes up arms without hesitation. Unlike his younger brother Háma, who is described as something of a warrior poet and particularly adept with a bow, Haleth is presented as a more traditional frontline combatant, ready to put his life on the line to protect Edoras and the Golden Hall of Meduseld. His key relationships are central to his identity: he is the loyal son of King Helm and the protective older brother to both Háma and an unnamed sister. His primary antagonist is Wulf, whose vendetta against the house of Helm drives the conflict of the story.

The narrative development of Haleth is tied directly to the tragic events of the Long Winter. As the eldest son, he is present in the capital when Wulf launches his surprise invasion. His role culminates in a desperate last stand, where he fights to defend the doors of Meduseld from the invading Dunlendings. According to the source material on which the film is based, Haleth is killed during this assault, becoming one of the first major casualties of the war and leaving his father and younger brother to continue the fight from Helm's Deep. His notable abilities, as highlighted by official sources, include exceptional martial skill and a natural capacity for leadership befitting his status as crown prince, making him a formidable opponent in close combat and a rallying point for the Rohirrim defenders.