Maria is a young Dark Elf girl from Apocalypse Bringer Mynoghra, known fully as Maria Elfuur. She is the older twin sister of Caria Elfuur, and together the pair are referred to as the Elfuur Sisters. Maria has silver hair that reaches down to her feet, blue eyes, pointed ears, and dark skin, typical of the dark elf race. She and her sister are the adoptive daughters of Isla, a legendary insect queen figure from the nation of Mynoghra. Maria's background is marked by tragedy. Her early life involved hardship and loss, and the death of her adoptive mother Isla served as a turning point. After Isla died protecting the twin sisters, Maria and Caria consumed Isla's heart and inherited her powers, initially becoming consumed by a desire for revenge against the demon lord they held responsible. However, they eventually regained their senses and came under the service of Takuto Ira, the ruler of Mynoghra.

Maria presents a pure and innocent personality that resembles that of a young child, despite being the older sibling. This childlike demeanor masks a deeply traumatic past, and while she seems naive on the surface, her experiences have shaped a complex inner world. She is capable of great loyalty and affection toward those she trusts, but the trauma of her past remains a part of her. Her primary motivation shifts from revenge to a desire to protect and serve her new home and king. She finds a sense of purpose and belonging within Mynoghra, and she becomes dedicated to the safety and prosperity of the nation. In the story, Maria serves as a caretaker and attendant to Takuto Ira. She is one of the few individuals who can interact with him without fear, which makes her invaluable as a companion and aide. Her role is primarily supportive, handling domestic and caretaking duties, but she is also a capable combatant when the situation demands it.

Maria's most significant relationship is with her twin sister Caria. The two share a deep bond, having endured trauma and loss together, and they complement each other in both personality and combat. She also has a close relationship with Takuto Ira, the protagonist and king of Mynoghra, acting as his caretaker and establishing a bond of trust. Isla, her adoptive mother, remains an influential figure in her past, and the legacy of Isla's powers shapes Maria's abilities. Maria's key ability is called Addle, a power inherited from Isla that allows her to corrupt the essence of her victims. She can also consume the abilities of others and store them in another dimension, using them later for her own regeneration and combat needs. These powers make her a dangerous opponent despite her innocent appearance. Over the course of the story, Maria develops from a traumatized child driven by revenge into a loyal and protective member of Mynoghra's inner circle. Her growth involves learning to trust again and finding a new family and purpose under Takuto's rule.