Sasaki has short hair with bangs on the right of her face. She wears a black headband and is most often seen in the Itan school uniform Sasaki is one-third of Komi's first-year field trip group. She and Katou Mikuni make a pact to make sure the trip is as fun as possible for Komi. When Komi-san was about to be kidnapped from Ninjas at the Futomaki movie, Sasaki Grabs an oni mask and scares them off with yoyos. It is soon discovered that the Ninjas were paid, actors.