There must be something about Aika behind the scenes that makes UF* staff really like her. I feel like there are certain OGs who don't get treated as well as Aika's been treated since her graduation.
Sure, her gig on Hello Satoyama is kinda dumb but now she's also got a radio show to go along with it... (P.s. When are they gonna send Koharu over to Satoyama life??) And now a drama/mockumentary/not sure what it is but...
Aika must be a really pleasant girl or UF* must feel guilty for fucking up her ankle.
Aika = still in H!P, appears on H!P TV show. Also realistically has the most free work time of any H!P member since she isn't realeasing singles or performing anywhere/in anything, so it's probably easier to have her take on things like the Satoyama radio show right now.
Koharu = not in H!P, probably won't ever appear on this particular H!P TV show. If it were a show with a less constricting concept, maybe.
Plus I don't think they wanted her to leave H!P or even Morning Musume for that matter. Her graduation was really REALLY sudden so they still probably have lots of plans for her.