When Johnathan reached the Mermaid Kingdom, the First Sea Power Battle had reached its end. The mermaids had been defeated at sea. When Johnathan arrived at the dock, he saw countless blackened warships and groups of wounded soldiers. It seemed as though dark clouds covered the sky of Plunburg.
Johnathan journeyed through the kingdom any trouble thanks to Marina Bossa's principal badge, but many citizens glared at him with hatred and fear as he passed.
Humans had taken their ships, declared war on them, enslaved and traded their brothers and sisters, and turned the peaceful Mermaid Kingdom into chaos. After the battle, the mermaid's dislike of humans had grown to a fuming hatred.