Cute. Where'd you get the PC-98 versions? I'd love to see the anime versions of the characters...
There's a collection of PC98 games somewhere on archive.org. They were a bit of a bitch to find because I don't know ANY japanese and couldn't tell what a file contained beforehand, but in the end I found PoR.
I'll check if I still have the link someplace.
There's little in terms of anime in the game's artwork, though. There are some notable diversions from the "classic" style here and there - most other versions are clearly copies of each other limited by the technical limitations of the respective platform - but whilst the PC98 version contains a lot of original artwork, it's usually in the spirit of D&D, so to speak.
As I understand it, the PC98 had a very impressive resolution for it's time, but only allowed a very small number of colors. Thus, the art all looks more "hi-res" than even that of the Amiga version with all it's glorious colors, but
it's evident much less in terms of colors was used.
Some monsters look a bit weird, for example Goblins, while others look virtually identical to their western counterparts - Kobolds come to mind.
In a small number of smallpics, you can see "asian influences". The default main head looks a little bit japanese, imo, and the "Barbarian head" looks a wee bit Mongol. One of the thieves looks a bit like a Yakuza.
But that's about it.
A number of pictures look remarkably similar across the board in all versions.
(PC98)
(Amiga)
(C64)