That is Loki
"Loki or Loke is a god or giant in Norse mythology. The 13th century Icelandic Poetic Edda and Prose Edda, two of the very few sources of information regarding the figure, inconsistently place him among the Æsir, as his blood-brotherhood makes him a member of Odin's family. Although frequently mentioned in 13th century Icelandic sources, it is generally believed by scholars that it is unlikely that Loki was ever worshipped.
In the Eddas, Loki is described as a son of Fárbauti and in the Prose Edda as also a son of Laufey. Loki also had two brothers (Helbindi & Byleist) of whom nothing is known. Loki is introduced in the Prose Edda as the "contriver of all fraud". Tales regarding Loki in these sources often feature Loki mixing freely with the gods for a long time, even becoming Odin's blood brother before arranging the accidental murder of Baldr by Höðr in the Prose Edda book Gylfaginning. After Baldr's death, the Æsir restrain Loki with the entrails of his son Narfi. He is eventually freed and fights alongside the Jotun against the forces of the Æsir at Ragnarök.
Loki is not to be confused with the similarly named Útgarða-Loki, a king of the giants in Jötunheimr."