Akadama-sensei, formally known as Nyoigatake Yakushibo, is a Karasu-Tengu residing in Kyoto. He acts as mentor to the Shimogamo tanuki family, especially Yasaburō Shimogamo, who regularly visits his apartment to deliver supplies and help with chores. A severe back injury prevents him from flying or walking comfortably, largely confining him to his home. He once kidnapped a young human girl named Satomi Suzuki, renaming her Benten and training her in tengu magic, including flight. He gifted her potent magical artifacts, but she later left to forge her own path. He remains affectionately attached and lonely in her absence. Akadama-sensei displays a proudly stubborn tengu demeanor, traditionally viewing humans and tanuki with disdain. This attitude fuels his strained relationship with his estranged son, Nidaime, whom he banished following a conflict a century earlier. When Nidaime returns to Kyoto, Akadama-sensei dismissively avoids direct confrontation. His influence extends beyond mentorship into tanuki society. He declined to officiate the Trick Magister election and controversially nominated Benten as his successor, facing tanuki opposition. His actions sometimes reveal a concealed caring side, such as mediating romantic relationships within the Shimogamo family, echoing his past assistance in matchmaking for Yasaburō’s parents. He possesses significant magical items, including the Fujin Raijin folding fan linked to wind and storm gods. Daruma dolls in his apartment, with their unpainted eyes symbolizing stagnation, reflect his own lack of personal goals. His legacy involves defending the Nyoigatake territory from rival tengu factions, a duty previously upheld by the late tanuki leader Sōichirō Shimogamo. Sōichirō's death, involving Benten, further complicates Akadama-sensei’s ties to both figures. Subtle shifts mark his development, from initial reluctance to engage with his son or tanuki matters to later, quieter moments of guidance, like advising Benten to channel her anger constructively after a defeat. These interactions highlight his enduring, though conflicted, sense of responsibility toward those he has shaped.