How does Brabantio appear to fit into Rod and Iago’s aforementioned (previously mentioned) plans so far? Provide a citation that supports your answer and explain how your citation supports your answer.

Iago knows that Brabantio will not approve of his daughter marrying a moor. Iago will set up a scenario where Desdemona publicly rebukes her father's wishes. Brabantio tells Othello that she has deceived her father and will deceive him. This will bolster the doubt that Othello has about Desdemona's fidelity later on in the play.

She has deceived her father, and may thee. Act 1 sc 3