Lady Sif had a minor role in Loki season 1, where Loki was sent to endure a painful memory on repeat. This memory was of Lady Sif beating him up for ruining her hair. As we all remember ...
Although Lady Sif was an important supporting character ... but she’s since reprised the role for a surprise cameo in the Loki Season 1 episode “The Nexus Event” and a minor appearance ...