Fréaláf Hildeson is a significant figure in the anime The Lord of the Rings: The War of the Rohirrim, portrayed as a nobleman of Rohan during a time of great turmoil. He is the nephew of Helm Hammerhand, the legendary king of Rohan, and the elder cousin of Helm's daughter, Héra, who serves as the film's central protagonist. At the outset of the story, Fréaláf holds the prestigious position of First Marshal of the Riddermark, the highest military rank among the Rohirrim, and is also the Lord of Harrowdale, making him a trusted and powerful commander within the kingdom.

In terms of background, Fréaláf is the son of Hild, Helm Hammerhand's sister, which places him directly in the royal line but not as a direct heir to the throne. This familial connection is central to his identity and his eventual destiny. The character is known for his exceptional diplomatic skills, a trait that sets him apart in a culture that often prizes martial prowess above all else. He is depicted as someone who is not afraid to speak the truth, even when that truth is difficult for his uncle the king to hear. His primary loyalty lies not with the crown itself but with the people of Rohan, and his actions are consistently guided by what is best for their survival and welfare.

Within the narrative of The War of the Rohirrim, Fréaláf's role evolves significantly. He begins as a capable and respected marshal, but his relationship with his uncle becomes strained, leading to a period of estrangement. In a notable departure from the traditional telling of the story, the film depicts Helm Hammerhand banishing Fréaláf from Edoras. Following his banishment, he takes refuge in the mountain stronghold of Dunharrow, a place of refuge for the people of Rohan. From this position, he continues to serve his people from afar, organizing resistance and preparing for a moment to strike back against the occupying Dunlendings, who are led by the vengeful Wulf.

Fréaláf's key relationships drive much of his character arc. His bond with his uncle, Helm, is complex, marked by both respect and conflict, as Fréaláf often serves as a voice of caution and reason against the king's prideful and unyielding nature. His relationship with his cousin Héra is one of kinship and mutual respect, and he becomes a crucial ally to her as the war progresses. Ultimately, after the deaths of Helm and his sons Haleth and Háma during the brutal Long Winter and the siege of the Hornburg, Fréaláf emerges as the rightful heir to the throne, being the last surviving adult male of the royal line. He leads a daring counter-attack, and in a climactic moment, he personally slays the usurper Wulf, reclaiming the capital of Edoras and avenging his fallen family.

The character's development sees him transform from a loyal marshal and advisor into a reluctant but determined king. The war and the loss of his uncle and cousins force him to step out from the shadow of Helm and embrace his own leadership. After securing victory, he is crowned as the tenth King of Rohan and the first king of the Second Line of its rulers. His rule is immediately confronted with the immense challenge of rebuilding a kingdom shattered by war and famine. In this difficult period, he accepts the aid of the wizard Saruman, who arrives with offers of support, a decision that sets a critical precedent for the future of Rohan and Isengard. His notable abilities include his military leadership, as demonstrated by his strategic mind and his personal courage in single combat against Wulf, as well as his political acumen and foresight in the aftermath of the war.