Sukezō is Chidori's fellow ninja and companion, originating from the same village. He accompanies her when they leave to serve Oda Nobunaga, fulfilling Chidori's vow to the warlord who saved her from drowning. Possessing technical aptitude, Sukezō functions as an inventor designing specialized tools for ninja operations, including the smoke bombs Chidori deploys during missions. He harbors a consistent romantic interest in Chidori, largely unreciprocated, and exhibits jealousy when others admire her, such as declaring Hattori Hanzō an enemy after Hanzō calls her cute. Chidori uses the affectionate nickname "Suke-chan," reflecting their close friendship despite her obliviousness to his deeper feelings, aligning with the series' "Oblivious to Love" trope. Throughout multiple seasons, including the conflicts of the third season (Anegawa Ishiyama-hen), Sukezō maintains a steady, supportive role within Nobunaga's forces, aiding Chidori and contributing his technical skills to missions. His core character traits, background, and role show no significant evolution across the documented media.