
Sir Andrew Aguecheek is a comic character in William Shakespeare's play Twelfth Night, or What You Will. One of the supporting characters, Sir Andrew is a stereotypical fool, who is goaded into unwisely duelling with Cesario and who is slowly having his money pilfered by Sir Toby Belch. He is dim-witted, vain and clownish. His role in the play not only provides comedy through his pathetic situation and his long speech, but also by his distinct, long-faced appearance and garish dress sense. The role has been a favourite for noted actors such as Alec Guinness, Christopher Plummer, Paul Scofield and Roger Rees.

Sir Toby Belch is a character in William Shakespeare’s Twelfth Night.

Feste is a fool in William Shakespeare's comedy Twelfth Night. He is attached to the household of the Countess Olivia. He has apparently been there for some time, as he was a "fool that the Lady Olivia's father took much delight in" (2.4). Although Olivia's father has died within the last year, it is possible that Feste approaches or has reached middle age, though he still has the wit to carry off good 'fooling' when he needs to, and the voice to sing lustily or plangently as the occasion demands. He is referred to by name only once during the play, in answer to an inquiry by Orsino of who sang a song that he heard the previous evening. Curio responds "Feste, the jester, my lord; a fool that the lady Olivia's father took much delight in. He is about the house" (2.4). Throughout the rest of the play, he is addressed only as "Fool," while in the stage directions he is mentioned as "Clown."

Malvolio is a fictional character in William Shakespeare's comedy Twelfth Night, or What You Will. He is the vain, pompous steward of Olivia's household.

Maria is a fictional character in the play Twelfth Night by William Shakespeare. She is a servant in Olivia's household. Maria is shown to have a friendly relationship with Sir Toby Belch, and exhibits a witty attitude. Maria also forges a love letter to Malvolio which results in Malvolio being confined to a dark room.

Olivia is a fictional character from William Shakespeare's play Twelfth Night, believed to have been written around 1600 or 1601. She is at the centre of the various plots, both the comedic and the romantic. She has various suitors.

Duke Orsino is a fictional character from William Shakespeare's play Twelfth Night, believed to have been written around 1600 or 1601.

Sebastian is one of the main characters from William Shakespeare's play Twelfth Night, believed to have been written around 1600 or 1601.

Viola is the protagonist of the play Twelfth Night, written by William Shakespeare.