I think you're meaning "Act 1" "Act 2" "Act 3" etc. correct? If so, The different acts are just like scenes of a movie. Often, there will be a curtain in between the acts to separate them, and/or to...
It's a role of an actor to be a Character in a play, films, so forth. Take on the role, the persona' of that character, to "harmonize" a clip. Making Associations with other people (their Character),...