Miranda watches from the wings. The performance is amazing. Miranda only feels a tiny twinge of regret when the cast goes out for their curtain calls, but she feels better when she sees Mom, Dad, and August backstage. She notices August looking lost, rushes up behind him, and greets him.
Here, Miranda is able to be the "adult" presence in August's life by saving him from the rushing crowd. This suggests that when given the opportunity, Miranda takes the same kind of parental role that Via does.