Question: are thor and loki brothers norse mythology?
Answer: According to the Prose Edda by Snorri Sturlson, Loki is the 'step brother' of Odin. Thor is not Loki's brother in any way, shape or form. They did not share a childhood together, not even an adopted childhood. Loki is a frost giant who impressed Odin on the High throne, according to the Prose Edda.