TV-Series
Description
Kei Ru leads the physically devoted Ru Clan, a noble house dwelling in isolation from Lukedonia's central politics. This seclusion kept him largely detached until pivotal events drew him into the fray. His first documented presence in the capital occurred five centuries before Cadis Etrama Di Raizel's awakening, prompted by an incident involving new-generation clan leaders.

His striking appearance features pale skin, untidy waist-length silver hair, piercing red eyes, facial stubble, and a prominent facial scar. A tall, massively muscled frame, marked by numerous scars, testifies to his warrior existence. He favors practical martial arts attire over aristocratic dress, visually distinguishing him. For formal occasions, such as the 500th anniversary of the previous Lord's eternal sleep, he wears a hooded cloak with golden accents, though he swiftly returns to simpler garments like footwraps and sleeveless tops. Non-facial scars are sometimes omitted in artistic combat depictions for stylistic efficiency.

Unwavering loyalty to Noble Lord Raskreia and a profound belief in self-improvement through relentless training define his character. He holds deep respect for elders like Gejutel Kertia, visiting him during imprisonment to declare disbelief in his treason and pledge future protection for Seira. Kei Ru adheres to a warrior's code, disdaining ganging up on a single opponent and spurning political power or conspiracies. Despite his clan's isolation, he possesses unique knowledge, such as the history of Lukedonia's Forbidden Region. He exhibits unfamiliarity with human societal norms, misunderstanding mundane tasks like dishwashing. His commitment to noble ideals includes a willingness to sacrifice himself to protect humans from threats like nuclear destruction.

Universally acknowledged as the physically strongest current clan leader by nobles and werewolves alike, Kei Ru specializes in devastating close-quarters combat. His Soul Weapon manifests as two powerful gauntlets, perfectly complementing his martial prowess. This focus on raw strength allows him to overwhelm opponents like the werewolf Drakon, defeating him by recognizing and overcoming Drakon's reliance on enhanced regeneration. His combat style involves analyzing foes before delivering decisive, full-power attacks, though prolonged battles against multiple enhanced adversaries can exhaust him.

During Lukedonia's invasion by traitor nobles and werewolves, Kei Ru confronted intruders in his territory. He crushed the werewolf Mount with brutal efficiency before engaging Drakon in a fierce one-on-one duel, ultimately prevailing despite Drakon's initial advantage. When overwhelmed by additional werewolf attackers, Raskreia intervened to save him. Later, shielding wounded clan leaders Ludis, Rozaria, and Gejutel, he blocked a surprise attack from the traitor Lagus, though the impact rendered him unconscious.

He accompanied Raskreia to werewolf territory to avenge Rajak Kertia's death. When the werewolf Zaiga attacked Raskreia, Kei Ru intercepted the assault and declared himself Zaiga's opponent. Their battle demonstrated Kei Ru's physical parity with Zaiga, featuring aerial clashes and endurance against lightning-based sorcery. After Zaiga resolved to kill him due to perceived potential, both unleashed their ultimate techniques, resulting in mutual injury. The fight ended unresolved with Muzaka's intervention.

In subsequent events, Kei Ru participated in clan leader meetings addressing threats like the Union and traitor nobles. He joined others in bidding farewell to Rajak and learned of Rajak's experiences with human chores. During the nuclear missile confrontation, he was among the clan leaders who sacrificed themselves alongside Raskreia to neutralize one warhead, demonstrating his commitment to protection regardless of cost.