Under Elysia's blessings that she learned from the Sea God in the past, everyone entered the deep ocean without needing a diving respirator or anything, just like the fish.
All warships and submarines dived into a particular seabed, a spot that Xentia identified as the most suitable place to build the mermaid's stronghold, the roots for the Mermaid Kingdom.
"Empire is not good. The most likely to be realized is a kingdom, the city within a stronghold." Elysia inspected the surrounding areas.
"Then, it's also good. The Mermaid Kingdom. We can build the stronghold after saving the mermaids and showing our dominance to enemies." Miko nodded in understanding.
"Pardon the interruption. If so, will you leave a defensive formation for this Mermaid Kingdom, master?" Dory dared herself to ask.
No... the wild is so scary and cruel. Poor fish monsters. They just wanted to have dinner, but they became dinner instead TT^TT
Or perhaps, they will hold a party in the Alaskan Bull Worm- oops, I mean, Volcanic Giant Worm's stomach?