Best Jeanist is an elegant man with flamboyant tendencies. He believes very strongly that people with influence must maintain a positive appearance both physically and socially. Best Jeanist often uses metaphors referencing jeans or denim, often inspiring his recruits with speeches, telling them to keep their life straight like their jeans. [3]

Best Jeanist admits to being unfond of brutish individuals like Katsuki Bakugo.[4] He took Katsuki on to try to fix his attitude only to be frustrated by the young man's stubbornness.[5] 

Best Jeanist takes the role of being a hero very seriously. He is selfless, brave, and charismatic, and aims to spread a sense of a peace to all people and believes heroes don't make excuses. He did not hesitate to take the full brunt of All For One's attack to save his allies, something the latter later praised him for.[6]