Raibaru appears to be serene, cute, and girly, but she is actually tough, scary, and brutal around criminals. Raibaru is only sociable and open to Osana Najimi, so even befriended and seduced students will refuse to distract her (which involves asking an embarrassing question) since they don't want to get on her bad side. If Ayano talks to Raibaru, Osana will stop and wait. If Raibaru hears any auditory distractions such as giggling and the radio, she will run instead of walk to the distraction.