I read this and then the LN. Knowing that the author is a massive fan of Monster Musume sorta cheapened it for me. Cthulhy is obviously based on Mrs. Smith in her 'sexy absentee authority figure' guise, who impedes Glenn/Darling from touching the girl. Saphee is 'thirsty snek waifu' like Miia. Tisala is 'warrior horse' like Centorea, and I don't doubt that we'll be seeing more expys as it goes on.
But.
But. The author does have an interesting world; this manga, this art makes the characters live.