Hagun Academy[]
Ikki Kurogane[]
Unlike most who would initially look down on him in their first encounter, Nangou held a high opinion of Ikki after seeing him stand before his former student being impressed by his resolve more so than most knights among the Kurogane even comparing him to his former rival and longtime friend. During his "training" with Ikki, Nangou has stated that at least in terms of swordsmanship, he had surpassed his great-grandfather.
Kurogane Household[]
Ryouma Kurogane[]
Nangou was Ryoma's friend and rival during World War II, where both fought against one another holding a high opinion in him even after his death.