Sif is undoubtedly the toughest female character to appear in the Marvel Cinematic Universe to date. Her Asgardian physiology ensures that she is super-strong and super-durable by default, but Sif is also an incredibly talented combatant in hand-to-hand fights and in fights with melee weapons (swords, shields, spears etc). In her appearance on Agents Of S.H.I.E.L.D., she displayed her strength when she was able to kick a large caravan/trailer around fifty feet quite casually (before completely no-selling a close-range shotgun blast and taking out a bar full of men). Sif has fought against monsters and warriors from all around the nine realms, including the likes of the Frost Giants, and almost defeated the Destroyer Armour in the first Thor movie when she acrobatically impaled it with a spear.
