lol come on dude, this is Japanese culture 101 here...being nice to people on the surface and hiding your true feelings, it is like the most fundamental part of how people in Japan act....everyone is 'respectful' to everyone else in Japan, their true feelings are another matter. 'honne and tatemae'. this is why so much av, probably the majority even, is about r***, doing a coworker or schoolgirl or housewife, seducing stepmom/daughter in law, it is all about what people fantasize about but would never dream of doing in the reality of avery rigid society. even the majority of IR being with black guys...the whole point is that a normal 'good' japanese girl would never go with a black guy (racist much i know!) but secretly turned on by their sex appeal but cant act on it. sure there are lame-ass backstories in western porn but not nearly as prominent as in AV, it is mainly just 'here is a hot girl getting fucked' where as breaking the 'honne' taboo is a huge turnon in japan.
so anyways, my point being you can be sure there is a lot of bitchiness going on under the surface of twitter in JAV! sure maybe Hibiki otsuki and Yui Hatano are BBF or girls are friednly to Hitomi and Anri on the surface, but human nature is human nature...this is a competitive business and increasingly cutthroat and there is a lot of jealousy and bitterness, especially towards certain girls. i have heard that Aika, Julia and Kirara asuka are widely disliked by other girls for their arrogant attitude and generally just being snooty bitches (this kind of comes across in their performances if u ask me!)! i also heard that Kaho Shibuya is looked down on for being too westernized by making a lot of her english ability, standing out from the crowd too much can often attract haters in Japan! apparently if you know where to look, you notice that certain girls who appear in a lot of group sex or lesbian titles never appear with each other, despite doing a lot of work with other girls...the reason is they fuckin hate each other! lol