Marjane's father in "Persepolis" is motivated by a desire for personal and societal freedom, democracy, and fairness. He initially supports the ideals of the Iranian Revolution but becomes disillusioned with the oppressive regime that develops.
The chorus, on the other hand, represents the collective voice of the Iranian people and serves to convey the broader societal context and the impact of the revolution. Their motive is to provide commentary on the events and reflect the hopes, fears, and struggles of the population as a whole.
While they share some concerns, Marjane's father's motive is individual-focused, while the chorus represents a broader societal perspective.