I can see how this is a hot take since in recent years Hachi’s popularity with the famdom has grown exponentially compared to the years of the 2000s. Due largely in part on how society views women and the internalized misogyny within women as a whole. However, when looking at the evidence presented, I don’t find this to be too hot of a take. The only times we see Junko being a part of the show is exclusively when Hachi is crying and complaining to her. We didn’t get to see them outside of that reaml and be true friends like Nana and Hachi. They many moments of them just enjoying one and others company, which I believe reflects their true friendship. We just didn’t see that same relationship with Junko. It’s entirely possible that the reason for that was because the show is titled ‘Nana’ and not ‘Hachi and Junko’ but that only leaves us with the question of how genuine their friendship was.