Rozaria Eleanor stands among the eight current clan leaders of Lukedonia, commanding the Eleanor clan with over eight centuries of experience. She possesses long red hair often swept into a high ponytail, piercing red eyes marking her noble lineage, pale skin, and distinctive glasses. Her signature attire combines a black mini dress with a knee-length black coat featuring white fur trim, accessorized with silver hoop earrings, a cross-shaped pendant necklace, and black boots.

Initially stern, Rozaria reveals a deeply caring and protective nature, especially toward Seira J. Loyard, whom she treats as a younger sister. She covers Seira's escape from the discipline room and insists the younger noble address her informally as "Unni." During combat with Seira, Rozaria demonstrates restraint and later praises her growth.

Her power centers on the Soul Weapon "Blood Witch," a staff crowned with a large eye that opens upon summoning. This weapon unleashes red aura discs, beams, and elongated explosive crystals. Rozaria can charge devastating concentrated beams capable of defeating formidable foes like Seira's Grim Reaper. Her signature technique, "Divine Judgment," summons a colossal eye to fire a catastrophic energy beam. Executing this attack demands preparation time and drains her significantly, but yields massive destruction, evidenced by obliterating multiple limbs from a modified target like Gradeus. Her mastery allows rapid execution, as noted during the Werewolf Arc.

Rozaria uniquely wields short-range teleportation to evade attacks and rescue allies, though its use is limited. She also bolsters barriers, supporting Ludis Mergas's shield during critical events. Additional abilities encompass aura manipulation, resistance to mind manipulation, necromancy, and blood-based techniques including "Bloody Rain" and "Corrosive Blood."

In combat, she exhibits tactical prowess, favoring long-range engagements. She subdues Seira effortlessly, withstands assaults from Gradeus, and survives a nuclear explosion through unexplained means, later reappearing unharmed. Her durability, speed, and attack potency scale to island level, particularly when prepared. During Lukedonia's invasion, she teleports to rescue Ludis and confronts traitor nobles, leveraging her agility and strategically deploying Divine Judgment despite its cost.

Her background includes overseeing Lukedonia's discipline, confronting traitor nobles under the Lord's orders, and participating in pivotal battles like the Werewolf Arc. She operates within the realm's hierarchical and honor-bound society, adhering to its formal customs while displaying fierce personal loyalty to those under her protection.