Creon is a tyrant. He is the antagonist in the play. He displays cool reason instead of being hot-tempered and emotional. As a result, he chooses the rational laws of man and rejects the irrational laws of the gods.
Antigone, on the other hand, is a heroine who understands the importance of duty towards her family. Creon instituted a law that forbade anyone to bury her brother, Polyneices. Antigone believed that burying her brother was more important that following the laws of the state.