Sunny still has the third unused enchantment of his crown, the enchantment of the sin of solace and the partial domain of shadow that he can use against her. I am interested in seeing what gets used first and how he develops.
"What am I doing? I'm doing my best to make sure that as many people as possible are evacuated safely. That's the mission I signed up for when I joined the First Evacuation Army. What are you doing?"
Between the Darkness Beetles, the Shadow Scavenger and the LO49 monster, I think this is a setup to give Sunny a very large upgrade to himself, his echoes and underwater endeavors.