In the end, who does Gallimard cast as the role of Madame Butterfly? Why?

Love warped Gallmard's mind so that he never saw how he was devoted to a lie, and a cruel one at that. This mirrored Butterfly's own downfall; instead of rejecting an abusive man, she loved him unconditionally. Because of this similarity, Gallimard ends up realizing himself as Madame Butterfly.