Talk:Nereid/@comment-27235572-20150425035953/@comment-25035274-20150425191034

It's a pleasure rune. Monsters use them to enhance, well, pleasure. KC uses them as an excuse to draw tattoos on his girls. A lot of the time, though not always, you'll see them adoring one side of a monster's body. Canonically, it's supposedly because a monster who was covered head to toe with the things all over wouldn't be able to think straight 'cause of the weird magical juju the runes have goin' on.

Non-canonically, I think it's because KC likes the look of them, but if he tried to slap them all over every monster girl he'd develop CTS in, like, a week.