Who is Creon (from The Phoenician Women) from Euripides V and what is their importance?

Creon is Jocasta's brother. He advises Eteocles before his attack on the Argive army, and Eteocles trusts Creon to become the ruler of Thebes upon his death. Eteocles also instructs Creon to ensure Antigone's marriage to his son and to disallow Polyneices from burial in Thebes. After Eteocles' death, Creon banishes Oedipus from Thebes, and he decrees that no one will bury Polyneices. Horrified, Antigone accompanies Oedipus into exile and refuses to marry Creon's son.