Sobeille is named for her uncle Sobo. She was born the day her grandmother Rosalyn died; Sobeille believes this is of great significance. Those in Sapphique may refer to her as her pet name Miette, given to her for her small stature.

A proud Sapphiqian, Sobeille is invested in her family's legacy. Hungry to learn everything of her powerful female family, Sobeille believes that Sapphiqian (and female) blood is superior. Sobeille has spent time in neighboring camps including Moonglow and Moonspear, learning the art of bone reading from Sialuk and the storied traditions of Moonspear from Kukutux. An unflinching sexist, Sobeille is downright dismissive of men.

Struggling with social cues, Sobeille has become increasingly alienated as she ages. She confides in only three wolves: Dogfish, Chani, and Astera. Even then, Sobeille is a restrained version of herself in their company -- there are parts of herself even Sobeille is uncomfortable acknowledging.

In early spring of 2024, Sobeille committed her first wolf murder. In August of 2024, Sobeille attempted to kill two more wolves but was discovered.

In the fall of 2024, Sobeille was kidnapped by a she-wolf named Sivaak. Having no chance to overpower the much stronger woman, Sobeille has willingly followed Sivaak - admiring the woman's cutthroat and careless nature, which is an abrupt departure from the more civilized nature of Sapphique.