Chuuya Nakahara is depicted as a fiercely passionate and hot-tempered individual in "Bungo Stray Dogs." His personality is characterized by his short fuse, often leading to confrontations with others, particularly his rival, Dazai Osamu. Despite his fiery demeanor, Chuuya is fiercely loyal to the Port Mafia and exhibits a strong sense of duty and honor. He is also shown to have a vulnerable side, especially in relation to his past and personal connections, adding depth to his character.