Who he is: Fandral, a.k.a. Fandral The Dashing
His power: Fandral is an Asgardian, meaning he possesses the superhuman strength, speed, durability, and longevity of every member of that race. However, he’s also one of their best warriors, a superior swordsman and fighter.
His story: Fandral is one of the Warriors Three (with Hogun and Volstagg), a good friend and ally of Thor, who—along with Sif—fights alongside him in many battles. In Thor, Fandral and the above fighters accompany Thor to Jotunheim, where they do battle with Frost Giants. During the melee, Fandral is injured and must be carried back to Asgard after Odin rescues them. However, he quickly recovers, and joins Sif and his fellow Warriors in disobeying Loki in order to journey to Earth and bring Thor home. (Not to mention helping him stop the Destroyer from blowing up a small New Mexico town in the process.)
During Thor: The Dark World, Fandral is shown having helped Thor to bring peace to the nine realms after the destruction of the Bifröst Bridge. He then joins Thor, Volstagg, and Sif in helping to protect Jane Foster from the Dark Elves, though he also aids Thor in helping to escape with both Jane and a newly freed Loki, against Odin’s direct orders. You’d think that might have consequences, but by the end of the film, when Thor is back in Asgard, Odin seems pretty cool about the whole thing.
Played by: Josh Dallas in Thor, and Zachary Levi in Thor: The Dark World
Currently, Fandral is: Probably in Asgard, being dashing and romancing ladies or something.
Where will we see him next? Unknown, though the best bet would obviously be an appearance in Thor: Ragnarok.