Shiori's classmate

Shiori's Classmate (栞のクラスメイト) is a girl in Shiori Misaka's class and is one of her friends. When Yuichi Aizawa asks students about Shiori, her classmate tells him that she fainted during the opening ceremony and had not returned since. Her actual name is not given during the series but is speculated to be Yukari Yumezaki.

Personality:
She is usually depicted as friendly, outgoing, and mostly kind to her fellow classmates (Shiori included) and those around her. It’s been stated that she gets along with others very easily.

Trivia

 * Shiori's classmate only appears in one episode of the 2006 anime.