In DIO, other than new users that’d just joined, everyone would have an ID nametag above their head, with the font being either white, yellow, or black. Users had white lettering for their nametag, and NPCs had yellow, which left monsters with black text. So, it was clear that these mermaids were monsters.

[Hey, you there? Say something.]

[You idiot. Humans can’t communicate with mind senses, so it’s impossible for them to talk underwater.]

[Then, do we need to take him up to the surface? I thought that humans who could swim all the way down here would be able to use mind senses.]

As the mermaids chatted, Merlin started circulating his magic power. Fortunately, he recalled reading about a spell related to mind senses in one of his spell books.

“Excuse me, can you hear me?”

[Hmm, it spoke?]

[I told you! It can talk!]

Some of the mermaids seemed happy that they were correct, whereas others appeared exasperated at the sight of a talking human. Regardless, none of them showed any signs of aggression toward Merlin.

“Anyway, is something...