his name is Gabriel the monster layer he's a regular human he's the author of a monster girl bestiary detailing his sexual encounters with these monster girls detailing how it felt like specific quirks they have (like ghost can deepthroat you because they don't need to breathe), some warnings for what a regular human should worry about when mating with these monster girls (like watching out for vampire bites while mating with a vampire or be bring a potion of fire resistance when fucking a salamander so you don't burn your cock off) as well as a detailed description of how to make each species climax he has fucked many powerful beings even goddesses he just finished writing writing an entry on demon queens.