Black's Friends & Allies

Naturally, Kotaro wasn't in the battle with Golgom alone. The following are his partners in fighting this evil threat:

Kazumi Kida & Kyoko Akizuki

Kazumi was Nobuhiko's girlfriend. She assisted Kotaro on many occasions to persuade Nobuhiko to remember his human side(Nobuhiko is also Shadow Moon).

Kyoko is Professor Akizuki's daughter and Kotaro's stepsister.

Ryusuke Taki

Interpol agent from America. Assisted KRB in two major battles against the Golgom mutants. (Editor's note: Is Ryusuke related to the FBI agent, Kazuya Taki from the first Kamen Rider series? His son, perhaps? Please let me know!)