Living alone with his daughter, Dojima is shown to be a hard-working detective, although he often becomes a workaholic. Tohru Adachi notes that he is a particularly harsh supervisor to him, but Dojima is a seasoned detective and takes his job seriously and is merely training Adachi for their line of work. While he loves his daughter, he has difficulty being a father to her, especially in wake of his wife's death, whom he states that Nanako resembles in both appearance and personality. 