Rozaria Elenor leads Clan Eleanor as one of Lukedonia's eight current clan leaders. She possesses long red hair often secured in a high ponytail, crimson noble eyes, pale skin, and wears glasses. Her attire features a black mini-dress beneath a knee-length black coat trimmed with white fur, complemented by silver hoop earrings, a cross pendant necklace, and black high-heeled boots.

Initially stern, Rozaria reveals deep care, especially for Seira J. Loyard. She acts protectively, offering to conceal Seira's escape from confinement and requesting Seira call her "Unni" (older sister) instead of formal titles. Rozaria displays unwavering loyalty to the Lord of Lukedonia and dedicates herself to upholding noble traditions. During crises—whether traitors threaten Lukedonia or fellow leaders like Ludis Mergas need aid—she prioritizes duty and communal defense over personal safety.

Her combat centers on the Soul Weapon "Blood Witch," a staff crowned with a large eye that opens upon activation. It projects explosive red aura beams, generates elongated crystalline projectiles that detonate on impact, and fires concentrated energy blasts capable of overpowering weapons like the Grim Reaper. Rozaria's clan ultimate technique, "Divine Judgment," summons a colossal skyward eye to unleash a catastrophic energy beam. This demanding attack requires significant preparation, rapidly depletes stamina, and can be augmented with a paralyzing magic circle to immobilize targets. She uniquely wields short-range teleportation among nobles, enabling tactical evasion and rescues, though constrained by range and frequency. Rozaria also provides supplementary support, such as reinforcing defensive barriers alongside other leaders.

In pivotal events, Rozaria intervenes to discipline Seira after her escape, reluctantly dueling her before delivering her to the Lord. She participates in defending Lukedonia against traitorous nobles and werewolves, rescuing Ludis from Gradeus via teleportation during an invasion. Later, she destroys Maduke's castle with Divine Judgment, provoking Gaura's retaliation. In that confrontation, Rozaria strategically combines teleportation, Blood Witch, and a paralyzing trap to annihilate Gaura despite her exhaustion. She witnesses key battles involving Rai and Frankenstein, noting their extraordinary powers while prioritizing the Lord's safety.

Rozaria's relationships highlight her mentorship and protectiveness toward Seira, emphasizing emotional bonds over formality. She collaborates with fellow clan leaders like Ludis, Kei, and Rajak, sharing concerns about Lukedonia's stability after betrayals and external threats. She does not appear in spin-offs such as *Rai's Adventure*, *Noblesse S*, or the *Beginning of Destruction* and *Awakening* OVAs.