Is it possible to find Ari after the date, also, I've completed all dates but am now just stuck roaming, is there something I'm supposed to do

I dunno where typos get reported, but in Chapter 3 Prinny says "Ari's just...  not there."  She does later mention Maddie being told to do something else, but Maddie makes it clear that no-one told her that the Meet-and-Greet was happening that day.  I'm pretty sure Maddie and Ari got switched in this convo.