Ulmina Bagliore serves as a member of the Inquisition and holds the position of Commander within the specialized Thaumaturge unit known as the Miracle Makers. She possesses long blonde hair parted at the center, revealing a prominent Inquisition insignia tattoo on her forehead, and golden eyes. Her hair is braided to carry an Inquisition crest just below her chest. She typically wears a distinctive white long-sleeved dress featuring a high collar and short flared skirt, accented with black stripes along the collar, sleeves, and skirt edges.

Her personality presents a contrasting duality: outwardly, she maintains a religious and naive demeanor, while internally exhibiting strong perverse tendencies. She frequently employs suggestive comments and body language with a vocal tone implying lewd undertones. A masochistic aspect emerges during combat, evident in the anime's second season finale confrontation with Seth, where she expressed frustration when denied the pain she desired. This emotional instability manifests through tantrums and crying when thwarted.

As the narrative progresses, her fixation on Seth intensifies significantly. By Chapter 104, this obsession escalates to the point where she threatens Dart Dragunov to deliver Seth to her, indicating a development towards more coercive and unstable behavior.

Her supernatural ability, referred to as a "Miracle," enables the temporary revival of deceased individuals within a specific area. This power activates through the incantation: "Patrem Inquisitor, Institutor Of The Miracle, May Your Light Guide The Lost."