The Kingsman franchise has the characters to thank for its massive success, and many of those, not just Eggsy and Harry, should return for Kingsman: The Blue Blood. The series has produced hit after hit, including a prequel film that had an entirely different cast. The films are full of blood and violence that feels excessive in moments, but they also try to achieve balance. Having interesting characters that use lots of crude humor is the perfect way to lighten what would otherwise be an extremely dark film, a strategy that will likely continue in the next Kingsman movie.