Sonya’s transformation to Moroi
Sonya turning back to a Moroi signals that all people have a second chance at life. She regretted turning into a Strigoi from the moment she first turned and now she has a chance to make amends for the pain she caused.
Lissa’s rise to Queen
Her ascent to becoming Queen is a metaphor for rise of the underdog – Lissa has come a long way from being an outcast as a self-harmer and her confidence has led her to become the youngest queen in vampire history.