Ao Nishizaki belongs to the trio dubbed "mecha mecha mote te ru mondaiji sannin gumi" (MM3) by their classmate Mimi Kitagawa. A prodigious student, he consistently achieves high academic marks despite frequently skipping classes. Ao shares a romantic interest in Mimi Kitagawa with his friend Toujou Ushio, though her affections are exclusively for Toujou; this unreturned interest shapes his interactions within the group. His academic prowess stands in counterpoint to his avoidance of formal attendance. Ao operates within the MM3's framework, participating in their troublemaking antics which persistently clash with the student council's efforts, particularly those led by Mimi Kitagawa.