Shiori Risa

Shiori Risa is Mei Mio and Ryusei Koki's teacher, Her class is located on the middle floor to the right side of the school

Trivia

 * The teachers name is a reference to the top famale Japanese name in 2012, Shiori placing 45 in the list and Risa placing 44 in the list. This has been proven by the Dev on his twitter page.