The introduction of female characters in plays is attributed to Euripides.
Euripides was a tragedian in ancient Greece, and he was responsible for the introduction of female characters in plays. He was considered a pioneer and one of the traits of his works is to picture mythical heroes as ordinary people in extraordinary circumstances.
Among his most famous works we can mention Medea, The Trojan Women, Orestes, Pheonician Women and the Bacchae.