ییوکاری شینومییا

One of Ayano's best friends and classmates. Yukari, along with Nanase, often teases Ayano about her apparent crush on Kazuma. She is well-connected to the information network of the student body and often knows what is happening around the school. Yukari's information extends beyond the school and into many areas of the Tokyo metropolis. She also carries a taser of unexplained origin with her.

(source : wikipedia)