President Alma Coin

Alma Coin is the main antagonist in Mockingjay, the third Hunger Games book. She is majorly disliked by Katniss due to her selfishness and ruthlessness, and she is a major villain for tricking Peeta and Gale into killing servants and Capitol people. She deliberitly killed Katniss' sister, Prim, using a bomb. She has a harsh hatred on the dictator of Panem, President Snow, or almost anyone who is associated with him in any way, but she is just as evil as President Snow and actually is somewhat like him in that she does anything and everything to win. Though this isn't revealed until very late in the book, she planned the rebellion in the districts by having them fight it out, leaving District 13 untouched; once the districts were hers, the Capitol could easily be nabbed. She is executed by Katniss near the end of the book, rather than President Snow, who was slated to die.