Ymir

Ymir is the first Frost Giant, father of Loki and his two Siblings, and the lord of Jotunheim. After a fierce battle where he and Surtr joined forces to drive the Aesir and Vanir away from Jotunheim, Ymir and Surtr branded each other as brothers, and would be there for each other. He had cut Jotunheim off from the rest of the Realms, spending his time studying magic and blessing his own body with enchantments to counter Aesir Magic, wishing to kill Odin for taking his son, Loki.