What does the reader learn about Brutus’s character from Act 2 Scene 1 of Julius Caesar?

From Act 2 Scene 1, the reader learns that Brutus values
freedom and honor.  When the men approach him to ask that he commit to conspiracy
against Caesar, Brutus thinks that he will go ahead with the men, not because he has a
personal problem with Caesar, but because the state of Rome would be better if it were
not led by Caesar.  The men suggest that Mark Antony also be killed with Caesar to
prevent him from taking rule, but Brutus says that Antony will have no power without
Caesar and that therefore, his death would be unnecessary.  Brutus thinks that blood
spilled without cause is unjust.  Later in the scene, Brutus's wife Portia demands that
Brutus tell her what is on his mind, and in order to persuade him, Portia tells him that
she is a good wife to him.  Brutus is swayed by Portia, and he values her role as his
partner, so he promises to give her the details of his mind after the men leave.  Here,
Brutus shows that he is an honorable character.