Rayla always assuming that her destiny is set in stone ("I don't want to, but I have to" / "Callum, it's no use" / "I have to go after him" / "But I know our mission comes first") vs Rayla always arguing that Callum's isn't ("What now?" / 3x01's "Calm down" / "Humans could take their fates and change them" / "No one can control you or make your choices for you") like. Yeah