She's in Class B and has known Yamato since middle school—apparently she was actually his first crush. Despite being cute, she's notably the one girl he hasn't kissed, which Yamato himself seems aware of.
Mei's description sums her up pretty well: she's on the shorter side with striking eyes and that fluffy, soft hair that catches light. Her lips are naturally high-colored, and overall she has this doll-like quality to her appearance. Fans often note that she fits a particular aesthetic that stands out against Yamato's other romantic interests.
Content compiled by AnimeList.moe from publicly available sources.