Sif

Sif is a character from the Marvel Cinematic Universe. She appears in Avengers: Infinity War and Avengers: Wrack of Dormammu. She is portrayed by Jaimie Alexander.

Avengers: Infinity War
Sif appears when Thor and Bruce Banner go back to Earth. She is also seen when Thanos attacks Asgard to get the Space Stone and Soul Stone.

Avengers: Wrack of Dormammu
Thor was training with Sif, Fandral, Hogun and Volstagg. Sif was in Thor's Team and the Warriors Three were their opponents. Later, Thor received a message and went away.

Some months later, Thor returnes and he finally says to Sif that he loves her.

Allies

 * Thor - Love Interest
 * Odin
 * Heimdall
 * Volstagg
 * Fandral
 * Hogun
 * Bruce Banner/Hulk

Enemies

 * Loki
 * Thanos