Define these characters and state how they relate to each other.
Julius Caesar
Calpurnia
Brutus
Portia
Cassius
Marc Antony
Casca
Decius
Metellus Cimber
Cinna
Ligarius
Trebonius
Artemidorus
Cicero
Popilius
Lena
Publius
Flavius
Marullus
Octavius Caesar
Lepidus
Claudius
Lucius
Strato
Varro
Cato
Messala
Titinius
Volumnius
Lucilius
Clitus
Dardanius
Pindarus