Koutarou Nanami  

, 七海光太郎

Morihiko Dan has another faithful assistant named Nanami who excels in the art of disguise. He frequently receives orders from Dan to monitor Class Q while concealing his identity among the suspects. Despite being carefree and enjoying showcasing his new talents to Class Q, Nanami can become very serious when necessary. His preferred disguise is that of a cactus, which he often wears with a vibrant sombrero or Mexican attire. This occurs when he's under pressure, such as during Dan-sensei's hospital stay when he had to take over as head of DDS.