Tatenashi Sarashiki is a 2nd year student at the IS Academy, Student Council President of the IS Academy, and the IS Representative of Russia. This is due her combat skills, which exceed the Cadet stage. She appears in Volume 5 on the Light Novel and appears in Season 2 Episode 1 on the Anime. She is also current Roommate of Orimura Ichika. She pilots the IS “Mysterious Lady,” a 3rd Generation type.
Her true name is Sarashiki Katana.