In Captain America: The First Avenger, Peggy Carter (Hayley Atwell) is an officer of Great Britain’s Strategic Scientific Reserve. She splits her time between firing a machine gun at Nazis and falling in love with Captain America. All this before being promoted to an agent of SHIELD.

Frank Castle is the Punisher, a vigilante willing to cross any boundaries in his fight against crime. After his family is brutally murdered by the mob, he wages an all out war by kidnapping, extorting, and torturing his way to justice.

Bucky Barnes (Sebastian Stan) is Captain America’s brother-in-arms until his plane explodes in Soviet airspace. The Russians rescue him, using the opportunity to program him to work for them as an assassin code-named the Winter Soldier. They also patch him up with a bionic arm, all the better for assassinating targets.

The twin sister of Quicksilver, Scarlet Witch (Elizabeth Olsen) has the ability to harness magic and use hypnosis and telekinesis. Sweet and caring, but extremely powerful, she’s battled mental illness for a long time. Originally supporting Ultron against the Avengers, Scarlet Witch battles her inner demons to figure out which side she should really fight for.

Emma Frost is a telepath who possesses diamond hard skin making her both a mentally and physically tough adversary. She initially uses her powers to oppose the X-Men but after a Sentinel attack she joins their cause.

In Jessica Jones, Killgrave (David Tennant) is the Purple Man, nemesis to Jessica Jones and the Daredevil. Born Kevin Thompson, his superpower allows him to verbally control nearly all those around him, which makes him one of the toughest villains to take down.