Viola is a young woman who is shipwrecked on the shores of Illyria. She disguises herself as a young man called Cesario and goes to work for Orsino.

Olivia is a wealthy heiress in Illyria. Her father and brother have recently died.

Orsino is a duke and the governor of Illyria. He is in love with Olivia even though she is not interested in him.

Sir Toby Belch is related to Olivia. He is often drunk and enjoys playing tricks on people.

Malvolio is Olivia’s steward, the manager of her household. He dislikes Sir Toby’s drunken behaviour and dreams of marrying Olivia.

Sir Andrew is staying with his friend Sir Toby and hopes to marry Olivia. He has a lot of money.

Maria is Olivia’s maid. She looks out for Sir Toby and likes to impress him.

Feste is Olivia’s jester, or fool. He also sometimes works for Orsino.

Sebastian is Viola’s twin brother. He was rescued from the shipwreck by Antonio and he thinks his sister drowned at sea.

Antonio is a sea captain. He rescued Sebastian from the shipwreck and follows him when they arrive in Illyria.