How does Hamada's interaction with Tracy at the end of Hamadi affect the readers understanding of his character

Hamadi's kindness toward Tracy teaches Susan that having compassion for others is the best way to live.

Explanation:

Hamadi contributes significantly towards the role of Susan; this is because she has been present entirely in her life. This is the reason why she has to mold her character. Besides, Hamadi feels closely connected to her in an elderly manner. The missing lover of a grandmother is what makes Hamadi step in and occupy that love she had for her grandmother. Therefore this love of Hamadi is clear evidence of his compassion that each one should have towards their friends.