Freyr's History
Freyr, a leader of the Vanir, is attested to have initially wished for his kin to have co-operation with the Aesir gods, travelling across the realms and teaching them how to till land and harvest crops; as well as spells that could facilitate the provisions of all of Asgard. The diplomacy appeared to work for a time, but the stubborn nature of the Aesir caused them to blame Freyr for their eventual inability to properly use the magic he had taught. The Vanir god was subsequently burned but he was able to survive and escape the Aesir and return to his home of Vanaheim. Because of what occured, this replaced Freyr's carefreeness with anger and paranoia for a while. Due to the incident that happened in Asgard, this event cited as one of the catalysts for the Aesir-Vanir War.
When Freya married Odin to end the war, Freyr felt hurt by this and believed what his sister did was selfish. He proceeded to angrily say some awful words to her during the wedding. After Freya was banished to Midgard by the All-father when she try to leave him, Freyr didn't bother to find her, as he believed that his sister is dead. For many years, despite his strong disapproval of Freya's marriage, he greatly missed her and always had hope that she would return someday.
Freyr is noted for being one of the few gods welcomed in Alfheim, to the point that he has his own temple there which Mimir describes as "beautiful." According to Mimir, Freyr has a long history with the elves.
Atreus can find a note in Freyr's temple left by the Light Elves, who have recently regained control of the Light of Alfheim but believe Freyr's presence will ensure true peace. Freyr had sent them forces and the sword of legend to help the Light Elves but he himself has yet to appear. The Light Elves wish to help Freyr. Some believe he has returned to Vanaheim while others believe he is being held in Asgard. Unfortunately, the paths to both realms are shut.
In God of War Ragnarök, it's revealed that Freyr had abandoned Alfheim to its fate in response to Freya's decision in marrying Odin. He also harbored a strong hatred for Mimir under the false belief that he had sold Freya to the Aesir, as well as wanting to cut off the former ambassador's head.
Appearance
Freyr is portrayed as a handsome young man in his early 20s with brown skin, brown eyes, and long brown hair tied back at one end with some beads, he mainly wears green and brown vanir armor worn from constant fighting.
Personality
When Kratos first encounters Freyr in Vanaheim, he is shown to be mistrustful of him - believing him to be one of Odin's lackeys - mostly due to fear and paranoia. He then grows hostile when he sees Mimir, due to having a strong grudge against him for convincing Freya to marry Odin. Once he discovers that his sister is free, however, he calms down and becomes much more amicable. Freyr is characterized by his laidback attitude and is a competent leader, although he considers himself as only being good for "inspiring" others. His followers in Vanaheim seem to disagree, and acknowledge his leadership capabilities. Despite the odd circumstances of his arrival in Alfheim, both Light and Dark Elves consider Freyr to be a god that can bring them both to peace, something he does later in the game.
Freyr has a distinct love of special Vanir "herbs" (seemingly marijuana), and is seen smoking it or referencing it at several points in the story. When on this special herb, he is notably more relaxed and calm even more so than his usual self. His love of this herb is so great that he once got so high he fell into the Lake of Light in Alfheim, and subsequently became revered by the elves when he emerged from it. When Kratos finds him in this state alongside his sister, he laments that he's not as good a leader as her and wishes he were better.
His relationship with his sister is more complicated. As children, Freyr and Freya were extremely close and loved one another, going on adventures together as they grew up. However, after Freya's marriage to Odin fell apart, it seems he believed she had turned traitor on them and ceased contact. Freyr also regrets the words he said to his sister at her wedding, believing that they would have been the last things he ever said to her. Despite this, when Kratos first meets Freyr he becomes incensed at the idea that she's being held prisoner. While there is some tension between the two, due to his actions, it's very clear that the siblings still do love each other greatly.
Like his sister, Freyr also held a strong hatred for Mimir under the false belief that he had sold Freya to the Aesir, as well as wanting to cut off the former ambassador's head.
