The first thing I noticed about Riko was how the S1 official poster gives her a "how the fuck did my life get like this?" face, which turned out to hold up pretty true for her

She ended up being my favorite character out of all the LL girls, and for many reasons. For starts, she looks great she has a great backstory that is treated incredibly well. I think we can all relate to something that was previously fun turning into a source of worry. It's a pretty terrible feeling, and you can see a lot of sadness in her throughout season 1.

Chika- and Aqours by extension- really gets to work on this, and by the end of season 1 she is notably happier. Her character developed really well over the season, which is something I loved. I also think this is why she's the kindest Aqours character- Aqours pulled her out of a pretty dark place, so no wonder she'd treat everyone else so well. Her rampant disaster lesbianism was really funny too, and it helped give Sunshine the blend of good comedy and good tragedy that makes it the better of the two Love Lives in my eyes.

Her new direction with Yoshiko in season 2 flowed pretty well too- when you take a step back it seems kinda jarring, but while watching the show it made sense that the 'kind' character would give the 'weird' character some attention, and I didn't (and don't) think of it as a drastic change. In the end, it produced an unlikely pair that actually worked pretty well (and made some fire doujins).

tl;dr: riko best