Yeah, Anno is a proud slut but like compared to Cait I just like her way more and more just generally fun.
She fucks around but only really for the fun of it, she ain't exclusive (not that MC isn't a manwhore either) and really just admits that quite openly, think it helps that while yeah she does have a lot of content, Anno hasn't really got new stuff.... since ever really, the last wiki activity was on March and nothing added new stuff for Anno because her list of scenes is quite big since pretty much ever, it helps she is more funny and more interesting than Cait imo.
Additionally she is a slut, not a whore, in practically all encounters but 1, she asks you to join in to fuck her or get fucked with her, she has some standards.
Can't forget the Kase interaction, the subby kaithrit boy is a fucking nervous wreck but she does try boosting his confidence a bit and actually befriends him, they do eventually fuck but really they are just friends, one of the bar encounters is the two just nerding it out and MC not interrupting just because they are having fun.