Ultimate Detective, called Super High School Level Detective (超高校級の「探偵」 chō kōkō kyū no “tantei”) in the Japanese version is a title given to multiple people in Danganronpa series.
Ultimate Detective refers to Kyoko Kirigiri and Shuichi Saihara. Although they have the same talent, their personalities and their detective skills are different. Kyoko is stoic and reserved about her feelings, not wanting them to affect her case. On the other hand, Shuichi is calm and timid, and he claimed that he solves his cases due to luck.