Primary

• Franz von Stresemann Mentor of Shinichi Chiaki

Extended

• Shinichi Chiaki Love interest of Megumi Noda
• Shinichi Chiaki One & Only Apprentice to Franz von Stresemann
• Shinichi Chiaki Apprentice of Sebastiano Vieira
• Shinichi Chiaki Former boyfriend of Saiko Tagaya
• Shinichi Chiaki Cousin of Toshihiko Miyoshi
• Shinichi Chiaki Son of Seiko Miyoshi
• Shinichi Chiaki Friend of Ryuutarou Mine
• Shinichi Chiaki Friend of Masumi Okuyama
• Shinichi Chiaki Former student of Kouzou Etou
• Shinichi Chiaki Nephew of Takehiko Miyoshi