Who are the main cast members of the movie Mission Impossible Ghost Protocol? What are their character profiles?
The main cast members of the movie Mission Impossible Ghost Protocol are:

1. Tom Cruise as Ethan Hunt: Ethan Hunt is the protagonist of the Mission: Impossible film series. He is a highly skilled IMF agent who is always willing to put his life on the line to save the day.
2. Jeremy Renner as William Brandt: William Brandt is a former CIA agent who joins forces with Ethan Hunt to stop a nuclear terrorist attack. He is a skilled analyst and a valuable asset to the team.
3. Simon Pegg as Benji Dunn: Benji Dunn is a tech expert who works for the IMF. He is a genius with computers and gadgets, and he is always coming up with new ways to help Ethan Hunt on his missions.
4. Paula Patton as Jane Carter: Jane Carter is an IMF agent who is assigned to work with Ethan Hunt on the mission to stop the nuclear terrorist attack. She is a skilled fighter and an expert in hand-to-hand combat.