黒谷

famous erotic author that takes interest in protag new novel. Keeps giving him advice on how to writer better. Almost always encouraging him to do more crazy stuff. Says she can help with promise of future series/hiring if he keeps writing erotic novels like the ones with having sex with sister

 Is little crazy and passionate about her writing and sex life. Mentions that she doesn't write made up stories but only the truth. Says most of crazy sex stuff in stories is about her random sex with men and women, orgies, sex toys, almost every type of fetish. Even sex with her brother but does it all for her writing as that is only way she can write passionate.