Tanjiro is very kind by nature and has been described by others as having very gentle eyes and a compassionate persona. He exhibits a great deal of determination and will not give up once he has a goal to achieve. He is very protective of his friends and even more so of his younger sister. Tanjiro is direct and very honest, taking everyone's words with sincerity and seriousness. He has difficulty lying and doing so causes his face to turn red. He has good sense of smell.