Odin is a great god as the highest existence in Nordic mythology. He is the father of Brynhildr and the other Valkyries, having created them from Sefar's corpse.
In Fate/Grand Order:
[Odin used [Cú Chulainn)(https://anilist.co/character/499) as a proxy to help him save the Human Order, granting him his authority transforming him from a Lancer into a Caster.]
In Fate/Grand Order Cosmos in the Lostbelt:
[6,000 years ago, Odin foresaw the plans of both [Goetia)(https://anilist.co/character/191866) and the Alien God. In order to save the Human Order, he possessed a fairy in the English Lostbelt and used him as a proxy, calling himself "Grímr the Wise".]
In Fate Einherjar:
[In the 9th century, Odin gave [Ragnar Lodbrok)(https://anilist.co/character/303889) a set of three trials to see if Ragnar was worthy of marrying [Aslaug)(https://anilist.co/character/301351).]
