SifSif and Thor are separated when he is banished from Asgard by his father Odin and begins a life as a superhero on Earth.
Sif shares powers common among all Asgardians, with her dense physiology granting superhuman strength greater than the average Asgardian female an on par with the average Asgardian male, limited invulnerability, as well as advanced stamina, speed, agility, and reflexes. Sif is also extremely long lived and maintains her youth and vitality through the consumption of golden apples. She is also highly skilled in hand to hand combat and proficient in use of cold weapons, favoring a sword and shield in battle. She is often said to be the best female fighter in Asgard, on par with Valkyrie.
Sif has appeared in various media adaptations of Thor, including the 2011 film Thor and its 2013 sequel Thor: The Dark World, in which she was portrayed by actress Jaimie Alexander.