>>4144
I don't know how much you've seen or read about Youjo Senki, but there isn't a single shred of positive light on communism throughout the entire series. It is sort of implied that Tanya isn't exactly a "good" person, but that's part of the point of it. There are no clear "good guys" in the series, but the story does at least make you root for Tanya, so, I don't think it's going to have that ending that you think it will. Mary Sue's name isn't meant to imply that she's the good character. The author confirmed it was merely chosen a joke.
>The only other time I've seen any other libertarian themes in Japanese media, it's as a supervillain
I don't think many Japanese people know what libertarianism is, but I can tell you a lot of anime I've watched have a libertarian undertone, whether intentional or not. Japanese writers tend to have a love for freedom and love making stories about a character overcoming some government or something that's holding them back. Examples: Gurren Lagann, Attack On Titan, and Code Geass. And there are many more!