LitCharts assigns a color and icon to each theme in Harry Potter and the Cursed Child, which you can use to track the themes throughout the work.
Parenthood
Time, Mistakes, and the Past
Friendship, Family, Love, and Bravery
Reputation and Expectation
Death and Sacrifice
Summary
Analysis
Harry and Ginny are in Professor McGonagall’s office at Hogwarts, explaining that they think Albus might be in the Forbidden Forest. Just then, Hermione and Ron both appear out of the chimney, offering to help search the forest. Draco emerges as well, cascading out of the soot. Harry is surprised to see him there, and Draco says he just wants his son back.
The fact that Hermione and Ron come out to help Harry and Ginny search the Forbidden Forest again affirms the importance of friendship in helping the characters solve their problems. The fact that Draco also comes out not only shows his care as a parent as well, but it also suggests that he and Harry are beginning to overcome their past differences for the sake of helping each other get their sons back.