In Assassin's Creed Valhalla, the Viking raider whose canonical version is female is Eivor.
Eivor is a Norse raider who leaves Norway with allies and settles in England during the 9th century. The player can choose a male or female presentation, or allow the Animus to decide, but later series material establishes the female version as the canonical Eivor.
Eivor becomes involved with the Hidden Ones through the settlement's relationship with Basim and Hytham. The story combines Viking settlement politics, conflicts among English kingdoms, and mysteries linked to the Isu, the ancient civilization central to Assassin's Creed mythology.
Sigurd is Eivor's adoptive brother and an important character, while Basim is a Hidden One with his own major storyline. Neither is the player character. The name Eivor is therefore the stable answer even when a player chooses the male appearance.