Mitsuhide Rouen stands as a steadfast right hand to Prince Zen, his position secured after proving his swordsmanship in the Sereg Knight Circle under Prince Izana’s recognition. Bound by unshakable loyalty, he prioritizes duty above all, channeling protective devotion toward Zen. This ethos leads him to reject a marriage proposal from Kiki Seiran, his trusted comrade and fellow aide, fearing personal ties might compromise his role. He cherishes his platonic bonds with both Zen and Kiki as foundational to his identity, equating union with either to an inseparable part of himself.

Commanding presence with a tall, muscular frame at 180 cm, Mitsuhide’s appearance shifts subtly across adaptations: his hair ranges from ashen black or ash brown in manga renditions to turquoise or sea blue in anime portrayals, while his eyes transition between hazel and brown. He adheres to a formal style, clad in tailored tunics and gambeson, a longsword ever at his side. Armor lightens outside combat, revealing scars mapping his torso—a burn marring his shoulder and other unnamed marks whispering of past battles.

Anchored by calm reliability, Mitsuhide reveals a bashful streak when teased by Zen, Kiki, or Obi. Though his charisma draws admirers, his unwavering focus on forging platonic bonds overshadows romantic pursuits. This dedication manifests in brotherly guidance toward Shirayuki and Obi, balancing protective instincts with political astuteness. His resolve crystallized when declining Kiki’s proposal, framing loyalty as his paramount creed.

His history pivots on unmasking Atri, a spy disguised as Zen’s ally—a trial that steeled his determination to safeguard the prince and cemented their trust. Further threats, like thwarting Prince Raj’s poisoning plot, showcase his strategic mind and combat mastery. A hypnotic potion once temporarily heightened his vigilance, intensifying his formal demeanor toward Zen until the effects were remedied.

Hailing from a low-ranking lineage, Mitsuhide rose through merit as a “nameless” knight, his humility shaped by childhood near the Seiran Estate. Early training in horsemanship and swordsmanship forged his disciplined ethos. While familial details remain private, occasional visits home hint at enduring ties to his roots, delicately balanced against his duties in Clarines.

His narrative weaves through tensions between obligation and camaraderie, clashing with rivals like Hisame Lugis while adapting to shifts within Zen’s inner circle. Through each trial, his journey echoes themes of sacrifice and fidelity, anchored by a steadfast commitment to remain Zen’s unwavering shield against all tides of change.