Merrow

Encyclopedia Entry:
A type of mermaid that lives in the sea whose special trait is the hat it wears on its head. They resemble “mermaids” and in the same way, they are a race that is friendly towards humans. However, they are different from the mermaids which have comparably docile personalities. Even among the mermaids family, they’re known as the “most lustful” race. When they find a man who strikes their fancy, they’ll probably use every part of their body to seduce them, and aggressively try to initiate sex.

Purportedly “even the insides of their heads are pink,” and their main interest is sex and romantic affairs with human men. They also peep on romantic affairs and sex of other monsters, and they like having amorous and obscene discussions. Of course, the thing that they enjoy most of all is spending time with their lovers and having sex. When they’ve fallen in love with a man from the bottom of their heart, they only have eyes for him, and all they can think about is sex with him.