but did you ask the artists before if you could use their art?
Viewing post in Burning Soul - prologue comments
Certain. I sent several emails especially to Kenkou Cross (the author of the design of the monster girl hellhound) but, sadly, I never got a reply. On the other hand, even the official fandom page Monster Girl Encyclopedia can release images and stories about Hellhound as long as they are not commercialized.
I am available for any further questions 😉