Well, the business with Matsuri was Mei protecting her turf while with Sara she was just acting out
Mei acted against Matsuri because she likes Yuzu, and if she wasn't ignoring Yuzu she would probably not pay much attention to Sara, after all part of the reason she accepted the confession was because Yuzu was not telling properly she loved Mei and would start talking about being sisters, the drill haired girl was also because Yuzu in Mei life, same with her father, all is conected to Yuzu and Mei love for each other, sure Yuzu is not causing direct character development in Mei, but shes the catalyst for all events that causes development.
last edited at Jun 28, 2015 2:42AM