Belch tries to get Sir Andrew to fight a duel with Viola's "Cesario" character as she leaves but Olivia has a crush on Cesario. Viola and Sir Andrew prepare for a duel that neither one wants. Antonio intervenes to defend Cesario, because he thinks he is his friend Sebastian, and is arrested for piracy against Orsino. Olivia has become engaged to Sebastian. Viola still does not recognize Antonio. Later, Belch and Sir Andrew talk to Sebastian, who does not back down from Aguecheek when challenged and beats him in the duel. Meanwhile, Olivia has met and become engaged to Sebastian.