Big Mama, whose real name is Kanure Stella, is a central figure in the world of the Sorcerer Hunters. She is publicly known as Saint Mama, the revered head of the Stella Church, but this position serves as a cover for her true role as the secretive and powerful commander of the Sorcerer Hunters. She co-founded this organization alongside Sacher Torte with the primary mission of protecting ordinary non-magical humans, known as Parsoners, from the oppressive and often tyrannical sorcerers who abuse their powers on the Spooner Continent.

Big Mama's personality is defined by her unwavering resolve and her protective, guiding nature towards her charges. She is a composed and strategic leader, often making calculated decisions to ensure the safety of the Parsoners and the success of the Sorcerer Hunters' missions. Her motivations are deeply rooted in maintaining balance and shielding the innocent from magical tyranny, which puts her in direct conflict with any forces that seek world domination or destruction. Despite her good-hearted intentions, her secretive methods and the weight of her strategic gambles can sometimes cause frustration and confusion among the Sorcerer Hunters she commands.

In her role as commander, Big Mama directs the core Sorcerer Hunter team, which includes Carrot Glace, Marron Glace, Gateau Mocha, Chocolate Misu, and Tira Misu. She typically delivers her mission orders through her trusted assistant and messenger, Dotta. Her authority extends to commanding the loyalty of the elite Haz Knights, a group of powerful warriors led by Millefeuille, who serve as her personal bodyguards. One of her most significant and complex relationships is with her former partner and co-founder, Sacher Torte. Their ideological differences caused a fundamental schism, with Sacher Torte becoming a primary antagonist who seeks to destroy and reshape the world, making him a direct foil to Big Mama's mission of preservation.

Big Mama possesses formidable magical power, recognized as imposing and placing her on par with major antagonists like the sorcerer Zaha Torte, who views her as his chief adversary. She also holds critical hidden knowledge about the larger cosmic struggle, particularly concerning Carrot Glace's true nature as the human vessel for the God of Destruction. Strategically, she withholds this truth from her own hunters for much of their journey, using them as key pieces in a larger conflict to thwart Zaha Torte's plan to harness Carrot's power for global annihilation. In the manga continuity, Big Mama's development culminates in a final, selfless act where she and the Haz Knights ultimately sacrifice themselves to stop Zaha Torte's ambitions and prevent a global catastrophe. The lore further reveals that Big Mama, like all Sorcerer Hunters, is a reincarnation of a deceased deity, placing her actions within a divine framework central to the overarching conflict.