I'm writing this with the hope that you are still developing Bloodborne PSX and in the faith that I can help in some way. I have never played the actual Bloodborne, however I can imagine that the enemies in this demake aren't exact to their origin. I've been looking through older playstation 1 games recently and noticed some games I think would help you if it's possible to access the game files. The game, NIGHTMARE CREATURES is the first one that comes to mind since it follows a similar 3rd person playstyle. That game seems to have enemy behavior that, if you can pull off in BloodbornePSX, would make leaps and bounds in its current state. I may be speaking out of my rear, but it's a rear that wants to see your creation at its greatest potential  of a demake.

Please keep developing this game