Edvard Grieg was a Norwegian composer best known for his Peer Gynt Suite, which was based on the play of the same name by Henrik Ibsen. The suite includes the famous 'In the Hall of the Mountain King' and 'Morning Mood'. Ase is the mother of Peer Gynt in the play, and Ases is the plural form of Ase. Trolls are supernatural creatures in Scandinavian folklore, and Helga and Anitra are two characters in the play.