Real Name: Sif
Occupation: Warrior, shield maiden
Identity: Publicly known on Asgard and on Earth, although the general populace of Earth tends not to believe she is a goddess
Legal Status: Citizen of Asgard
Other Aliases: None
Place of Birth: Asgard
Marital Status: Single
Known Relatives: Heimdall
Group Affiliation: Gods of Asgard
Base of Operations: Asgard
First Appearance: JOURNEY'INTO MYSTERY #102.

History: Sif is a warrior goddess of Asgard and the sister of Heimdall, the watchman of Asgard. As a child she had golden hair and was an occasional playmate of Thor, son of Asgard's ruler Odin, and Thor's adoptive brother Loki.

While Thor and Sif were still adolescents, they fell in love with each other. Determined to ruin his hated adoptive brother's happiness by ending the relationship between Thor and Sif, Loki cut off all of Sif's golden hair while she slept. Realizing Loki must have been responsible, Thor angrily confronted Loki and demanded that he restore Sif's hair. Loki sought out the dwarves Brokk and Eitri and asked that they create new hair for Sif through their arts. However, Loki was either unable or unwilling to pay the dwarves gold for this work. The dwarves decided that for the "price of naught" they would create "strands of naught." They magically created long black hair from the blackness of night. Once set upon Sif's head, the hair magically took root and began to grow. Thor thought Sif was even more beautiful with the black hair than she had been before, and thus Loki's plan to ruin their romance failed.

Eventually Thor and Sif parted when Sif began her training to be a warrior in earnest. Odin, lord of Asgard, had long deemed Sif to be a fitting mate for his son Thor. Just after Thor's relatively brief relationship with the mortal woman Jane Foster came to an end. Odin, hoping to turn Thor's feelings in a different direction, arranged for him to meet Sif once more. Sif was now highly accomplished in the ways of the warrior. Soon after meeting Sif again, Thor and Sif became lovers and companions, as well as allies in numerous battles. Eventually, they decided to marry.

However, Thor's attachment for Earth frequently came between them. Sif much preferred the world of the gods to the mundane world of mortals, and, after attempting to adjust to Earth life on more than one occasion, returned to Asgard to live without Thor. Once, when Thor's mortal paramour Jane Foster was dying, Sif lent her, life force to revive the woman, "merging" with her in the process. She did this apparently in an attempt to understand Thor's attraction for this mortal. Jane Foster was separated from Sif shortly thereafter, and sent to the limbo realm of the Runestaff of the Possessor. Sif and Thor have since rescued Foster. Sif and Thor both aided the alien champion Beta Ray Bill in defending his people against the onslaught of the demon armies of Surtur. Sif and Beta Ray Bill found themselves increasingly drawn to each other emotionally. Sif's relationship with Thor was greatly worsened when Thor, who was forced by enchantment to fall in love with the Asgardian Lorelei, struck Sif in anger. Sif even decided to leave Asgard and accompany Beta Ray Bill back to his people.

However, Sif came to realize how deeply sorry Thor, who had been freed of Lorelei's enchantment, was for having struck her. Moreover, Sif finally fully realized that Lorelei was really to blame for Thor's striking her and Sif was also greatly impressed by Thor's heroism in descending into the realm of the death goddess Hela to rescue the souls of Earth mortals. As a result, Sif finally accepted Thor's role as guardian of both Asgard and Earth, and decided to stay behind in Asgard while Beta Ray Bill returned to his people. Sif and Thor once again linked by strong bonds of affection, but what path their relationship will next take remains to be seen.

Height: 6 ft. 2 in.
Weight: 425 lbs
Eyes: Blue
Hair: Black, originally gold.

Strength Level: Sif possesses the normal strength of an Asgardian woman ("goddess'') of her physical age, height, and build, who engages in intensive regular exercise. Sif can lift (press) 30 tons. (The average Asgardian woman can lift about 25 tons.)

Known Superhuman Powers: Sif possesses the conventional attributes of an Asgardian woman ("goddess"). Like all Asgardian she is extremely long lived (though not immortal like the Olympian gods), aging at an extremely, slow rate upon reaching adulthood, superhumanly strong, immune to all Earthly diseases, and resistance to conventional injury. Asgardian flesh and bone is about three-times denser than similar human tissue, contributing to the gods' superhuman strength and weight. Sif's Asgardian metabolism gives her superhuman endurance at all physical activities.

Abilities: Sif has had extensive training in unarmed combat as well as swordsmanship. Her fighting ability is only surpassed among known Asgardian women by Brunnhide the Valkyrie.

Weapons: Sif wields a special sword enchanted by Odin to enable her to "cleave" passageways between dimensions (primarily between Asgard and Earth) by a special pattern of swinging motions.