Alright. Guess will just have to wait on it.
That being said, I do want to mention it may be good to double check the naming. Because although calling "img/faces/luna1.rpgmvp" seems to give the forbidden error every time, I see it calling "img/faces/Luna1.rpgmvp" at a different point with no issues, and based on the names (The capital "L"), it could be a typo.
This is all just guess work on my side though. I just want to mention it because I know how annoying it can feel if you are stuck trying to fix code just to find it was a random typo somewhere.
nvm what I said above. Now that I think of it, I doubt that part is case sensitive. The stuff in the header was different anyway.