Sif

An Asgardian goddess born and raised in the realm of Asgard, Sif grew up alongside Thor and trained relentlessly to become one of the fiercest warriors in the Nine Realms, mastering swordsmanship to a level surpassed among Asgardian women only by Brunnhilde the Valkyrie.

Born from the Silver Age imagination of Stan Lee and Larry Lieber, Sif made her debut in Journey into Mystery #102 in 1964 and has been one of Marvel's most enduring Asgardian figures ever since — 311 catalog appearances across an extraordinary 62-year span that stretches all the way to 2026. She keeps legendary company, sharing adventures with Thor Odinson, Odin, Loki, Volstagg, and Hogun across the pages of Thor, Thor Annual, and Ultimates, placing her at the very heart of Marvel's mythic corner of the universe. With ten key issues to her name, collectors and fans alike have long recognized that Sif is no background player — she's a cornerstone of Asgardian storytelling whose presence has defined and deepened Marvel's Norse mythology for generations.