Terumasa Takai holds the position of secretary to Kou Ichinomiya at one of the Ichinomiya companies. Aged 51, he stands 174 cm tall and weighs 59 kg. His appearance features black hair trimmed to ear length, pale eyes, and a balding scalp, consistently portrayed with glasses. A pivotal personal event—his wife's departure—precipitated his employment under Kou. Over time, Takai cultivated profound admiration for his employer, drawing inspiration from Kou's words and nurturing a deep personal fondness for him.