Han Lu and Nellie did not stop and rest after returning to the shore, running all the way to the Self-Defense Forces' base. They rejected the captain's proposal to ask the Fisheries Association for help, and they did not seek help from the police station.
This was because there was no one could deal with those things underwater except the army. When it came to this matter, Nellie felt more nervous than Han Lu. Other than the fact that Zhang Heng had rescued her earlier, she could not imagine the island she lived in would be surrounded by a larger group of monsters.
Yonaguni Island had was sparsely populated. Most of them were civilians with very little combat experience. Nellie had not forgotten the wall carvings that she saw earlier, where the monsters would ambush the human towns. Yonaguni Island was her hometown, where her friends and relatives lived. She had to protect it at all costs.