Kurodo-no-to Hiroie Kikkawa, grandson of Motonari Mōri, served militarily during Hideyoshi Toyotomi's Korean campaigns and held the position of Kurandonotou, overseeing the Secretarial Division to the Emperor. His defining historical action was secretly negotiating a ceasefire with Nagamasa Kuroda during the Battle of Sekigahara after predicting the Western Army's defeat. He refused to mobilize his troops, infamously declaring they were occupied with eating lunch, ensuring Mōri forces remained inactive.

Physically tall at 180 cm (approximately 5'11"), Hiroie possessed a personal interest in cooking, citing shrimp as his favorite food. Fictional portrayals depict him with a domineering and rude demeanor, often intimidating allies to prevent their advancement in battle, while occasionally displaying a laid-back or irreverent attitude that masks deeper strategy.

Assuming leadership of the Kikkawa clan increased Hiroie's responsibilities, leading to shifts in his demeanor. This role forced difficult decisions, resulting in observable stress. Despite a preference for peace, external pressures often compelled his involvement in conflicts. He exhibits fierce protectiveness toward his family when threatened. His personality shows contradictions, blending moments of goofiness with sternness, alongside a noted capacity for consuming multiple bento boxes during prolonged engagements.

Tactically, Hiroie emphasizes covert maneuvering and negotiation over direct confrontation. He prioritizes clan safety through strategic withdrawals or alliances, such as with the Tokugawa while serving under the Western Army, aligning with his historical role in facilitating defections or ceasefires.