|This article is about the jarl and brother of Eivor Varinsdottir. For other uses, see Sigurd.|
Sigurd Styrbjornsson (born 842) was the son of King Styrbjorn Sigvaldisson of Fornburg. The husband of Randvi, he was also the older step-brother of Eivor Varinsdottir, who was adopted by Styrbjorn at the age of nine following the death of her parents, Rosta and Varin. He was also the reincarnation of the Isu Týr, the Norse god of war and justice.
While his sister stayed in Norway and opposed Kjotve the Cruel, Sigurd embarked a journey to raid the lands in the East. While in Constantinople, Sigurd met and befriended the Hidden One Basim Ibn Ishaq and his apprentice Hytham, learning many of the organization's customs. In 872, Sigurd returned home along with Basim and Hytham and gave a Hidden Blade to Eivor.
Sigurd was born as the son of King Styrbjorn of Fornburg in 842. During a feast around 855, Fornburg was attacked by the army of Kjotve the Cruel. A teenage Sigurd took part in the fighting, rescuing Eivor from one of Kjotve's men, and attempting to get her to safety. After the raid, King Styrbjorn adopted Eivor as his surrogate daughter, and Sigurd became a brother to her. At some point, Sigurd married a Norse woman named Randvi.
Travels in Bulgar
Circa 870, Sigurd went on a two-year voyage, during which time he traveled through Kievan Rus'. While in Bulgar with his cousin Knud, Sigurd visited the swordsmith Tekin, looking for a blade of crucible steel. Tekin and two others then attempted to ambush him, though they were easily dealt with. The youngest attacker bartered for their life, telling the Norsemen the location of a castle of a very rich merchant.
Knud and Sigurd infiltrated the castle, seeing the merchant and a number of guests having a banquet. Sigurd decided to wait until the wine addled the guests' minds enough that they would have an easy time stealing what they wanted. Later, they began looting the place, but one of the guests awoke as Sigurd stole a tapestry, and he was forced to kill him. The noise caught the attention of another guest, the Hidden One Ammon, who decided to investigate. The Vikings dispatched a few guards before Ammon arrived, fatally stabbing Knud with his Hidden Blade and launching himself into a fight with Sigurd.
The Hidden One cut Sigurd's sword in two and stabbed him in the gut with his Hidden Blade before leaving. Sigurd survived the wound and made his way to Ammon, finding him holding a Shroud. Sigurd mocked him for treasuring a dirty rag, throwing Ammon into a frenzy. He attacked the Viking, only to be slain. With his dying breath, he begged Sigurd not to take the Shroud, although the Viking had no interest in it and instead used his axe to sever Ammon's right wrist to claim the Hidden Blade for himself.
Meeting the Hidden Ones
Sigurd continued his journey through to the Khazar Khaganate before setting down in Constantinople to rest and resupply, or so he claimed publicly. He may have attempted to raid the Hagia Sophia. While in Constantinople, he met and befriended two Hidden Ones from the Abbasid Caliphate, Basim and Hytham, the former of whom took a liking to Sigurd due to his charisma. He later sailed to Rome and Africa, where Basim and Hytham acted as his guides. During his time abroad, Sigurd began to miss his old homeland, and sailed for Norway with Basim and Hytham traveling with him. 
Return to Rygjafylke
In 872, Sigurd returned to Fornburg along with his new friends and met his father, the King Styrbjorn, his wife, Randvi, and his sister Eivor. His family organized a feast in his honor and, there, Sigurd introduced Basim and Hytham to Eivor and gave her the Hidden Blade he had taken from Ammon. Sigurd watched as Basim taught Eivor the technics of assassination of their Brotherhood and explained its tenets to her. As they left, Sigurd was left alone with Eivor and, as they walked towards the docks, Sigurd reminisced on their memories together and confided on her that, after years of travels around the world, he felt that their settlement was too small for him and, therefore, asked her to help him take some of Kjotve's lands the next day.
Personality and characteristics
Sigurd was charismatic and passionate, easily drawing people to his service. His family, especially his sister Eivor, held him in high regard. While he had great skill as a leader, his ego and lust for glory would many times cloud his judgment, even to the point were he would ignore the advices of those who were close to him. Sigurd was a skilled warrior and cunning tactican, leading many successful raids before his voyage to England.
While quite intelligent with a skill for politics and military tactics, he was easily manipulated by Basim, by playing on his desire for greatness. Although slowly, he was deceived by him to encounter Fulke, an action that triggered all the events that led to the discovery of the Yggdrasil Chamber. He becomes increasingly short tempered and cruel to his subjects, after the events with Fulke. Despite that, he was wise enough to, in the end, let Eivor assume the control of the Raven Clan.
Behind the scenes
Sigurd Styrbjornsson is a character appearing in Assassin's Creed: Valhalla, and introduced in the prequel comic Song of Glory. He is voiced by the Icelandic actor Gudmundur Thorvaldsson, as revealed on his Twitter. His Database entry in Valhalla inconsistently refers to him as both "Styrbjornson" and "Styrbjornsson", although the former is used in the entry title.
- Assassin's Creed Valhalla: Song of Glory (first appearance)
- Assassin's Creed: Valhalla
- Assassin's Creed: Rebellion – The Ravens' Wound
- Assassin's Creed: Rebellion – Database: Sigurd Styrbjornsson
- Assassin's Creed: Valhalla – Prologue
- Assassin's Creed Valhalla: Song of Glory – Issue #01
- Assassin's Creed: Rebellion – The Ravens' Wound – The Horn of the Valkyrie
- Assassin's Creed: Valhalla – Where Legends Are Born
- Assassin's Creed: Valhalla – The Prodigal Prince
- Assassin's Creed: Valhalla
- Assassin's Creed Valhalla: Song of Glory – Issue #02
- Assassin's Creed Valhalla: Song of Glory – Issue #03
- Assassin's Creed: Valhalla - Database: Sigurd Styrbjornson
- Assassin's Creed: Valhalla - Brewing Rebellion
- Assassin's Creed: Valhalla - Blame and Sail
- Assassin's Creed: Valhalla - A Brother's Keeper
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