Mei goes to Seimei High School and appears in episodes 12 and 13. She joins Seimei's Kendo Club because of her friends, but later on, her friends quit the club because of the strict training. She decidedly wanted to quit after the practice match with Muroe High School's Kendo Club; however, she decided to continue after watching Tama's skills in a match.

(Source: Wikipedia, ANN)