Shuichi Hatanaka (畑中秀一, Hatanaka Shuuichi), known as Kokoda in the English dub, is the son of Shiori Minamino's new husband, and is Kurama's human step-brother. He happens to have the same name as his step-brother, resulting in the name change in the English Dub.
Shuichi is very cheerful and looks up to his step-brother. When possessed by the parasite however, he becomes more reserved and mocking.
During his return to Human World at Yomi's behest to collect Shishiwakamaru, Jin, Toya, Chu, Rinku and Suzuka, Kurama's new step-brother was possessed by Kara, a low-level parasite demon, at the behest of Shachi, the former chief of Yomi's military. Kurama threatened the parasite and made him betray his master, feeding Shachi lies that Kurama did not plan on coming back. When Kurama cut Shachi down, the parasite left Shuichi in search of another host. Shuichi wears a blank expression on his face, as if he doesn't remember anything that happened.
- His dub name was taken from a scene where Kurama called out to him in his original Japanese line, "I'm here" (koko da).