One of the conspirators. Casca is a cynic—a personality type Shakespeare contrasts with the stoicism of Brutus and the Epicureanism of Cassius—and is therefore sarcastic and rude. He seems to want to kill Caesar not out of jealousy like Cassius, or out of concern for Rome like Brutus, but because he thinks Caesar is a phony. Casca is the first one to stab Caesar.
The Julius Caesar quotes below are all either spoken by Casca or refer to Casca. For each quote, you can also see the other characters and themes related to it (each theme is indicated by its own dot and icon, like this one: Note: all page numbers and citation info for the quotes below refer to the The Folger Shakespeare Library edition of Julius Caesar published in 1992.).
Act 1, scene 2 Quotes
But those that understood him smil'd at one another, and shook their heads; but for mine own part, it was Greek to me.
The timeline below shows where the character Casca appears in Julius Caesar. The colored dots and icons indicate which themes are associated with that appearance.
Act 1, scene 2
Caesar enters with Antony, Calpurnia, Portia, Decius, Cicero, Brutus, Cassius, and Casca, followed by a Soothsayer and many Plebeians, and Murellus and Flavius. Caesar instructs his friend... (full context)
Cassius is glad his "weak words" (1.2.177) were effective, and suggests they ask Casca what they missed, as Caesar's procession returns. Brutus says Caesar looks angry, and the others... (full context)
Act 1, scene 3
...other conspirators are assembled. Cassius gives him letters to plant where Brutus will find them. Casca and Cassius discuss how Brutus is essential to their plan, because he's so respected that... (full context)
Act 2, scene 1
Act 2, scene 2
Act 3, scene 1