I've seen a lot fanart/doujins that still depict Kumiko as her awkward, panicky self around Reina, but after their 'date'/hike up the mountain, she's gotten increasingly more comfortable around Reina, is more supportive, teases her sometimes and speaks her mind more. Sure her awkward dork self was cute, but it'd be nice to see more of how close she's gotten to Reina, and how it reflects in her behaviour.