Which rhetorical appeal does Portia use to persuade Brutus to confide in her?

Portia uses ethos to persuade Brutus to confide in her by demonstrating her credibility and moral character. In the context of the story, she emphasizes her loyalty and strength of character, asserting her suitability as someone who can be trusted with sensitive information. By highlighting her relationship with Brutus and her resolve, she builds her authority as a confidante, suggesting that her emotional investment and integrity qualify her to hear his burdens. This appeal to ethos is effective because it seeks to establish a bond of trust between them, which is essential when trying to persuade someone to open up about personal matters.