To be honest, this anime was decades old and I was watching it ages ago where Isekai wasn't even a thing.
After giving some thought I tried to re-watch once again just to see how my perspective on anime was and god surely it's feels so good. Firstly I noticed the character doesn't even have common name like your usual fantasy generic things, instead they're using title as a name (seems familiar with one controversial anime back in 18') after giving second and third episode I realize this anime doesn't do your typical anime stuff but rather they took world building as a theme.
In any common sense, if the story don't sold you then the character if not then the world building, by far I think the world building pretty make sense and legit make me want to Re-watch first three episode.
About the character design, I don't know how to say it, the character felt lovable and likable but I can't say they're my favourite perse at least they're decent.
Overall the story was interesting and as matter fact it's the only story I know since ages ago that trying to do world-building at that time before anyone else does this genre.
8/10