Touma Akechi transfers into PK Academy and immediately distinguishes himself through extreme talkativeness, speaking at length in nearly every interaction. He possesses a sharp deductive mind and investigates potential psychic abilities in Kusuo Saiki. This suspicion arises from being Saiki's elementary school classmate, where Akechi observed unexplained phenomena linked to him. This past connection fuels his determination to uncover the truth after their reunion. Akechi actively questions classmates about unusual occurrences related to Saiki, gathering evidence of psychic powers through persistent, methodical deduction. During a class sweet potato harvesting activity, he deliberately exploits Saiki's known fear of insects, strategically creating situations designed to startle Saiki into revealing his abilities. While primarily focused on exposing Saiki, Akechi also participates in other school events, including the incident involving a robotic cat mascot created by Saiki's brother and the situation surrounding Metori Saiko's temporary decision to leave. His constant probing and talkative nature create persistent complications, challenging Saiki's attempts to maintain a normal school life. Akechi's background and actions establish him as a recurring source of disruption motivated by intellectual curiosity and a drive to prove Saiki's secret powers.