Adachi seems to be a cheerful and jovial detective displaying textbook incompetence, such as threatening to throw up upon being asked to investigate a murder scene. He is outright treated as comic relief, due to his irresponsible and slacking nature. He also tends to make terrible unfunny jokes and puns that only he would enjoy. He jokingly refers to himself as Dojima's slave, complaining about the workload that his partner piles on him. Adachi is shown to be rather lazy, even encouraging Nanako