Doppo appears to be a very serious, but also slightly hot-tempered person. Throughout his life he documents events in a notebook. He is a perfectionist. As a member of the Armed Detective Agency, Kunikida takes his job very seriously and responsibly. He constantly feels the need to organize, collect, and schedule. Doppo is a trustworthy and loyal detective who is relied upon by many in the agency for his authoritative abilities and responsible nature.He is almost never seen without his signature