Lavie hails from Marseille and enrolls at Flora Girls' Academy, driven by admiration for the legendary Ray unit leader, Eliza. Assigned to the lowest-ranked Lapis dormitory due to poor test scores despite her magical talent, she consistently ranks last in her class and struggles deeply with written exams, especially disliking supplementary tests. Her hobbies encompass all sports and clothing window shopping.

Exuding high self-confidence, Lavie frequently declares herself the "class ace," though her naivety and occasional obliviousness to serious matters can frustrate others. She possesses remarkable physical abilities and excels in dance, perfectly replicating routines after seeing them just once. This skill earns her a place among the academy's top dancers in the cheerleading club. Lavie serves as the choreographer for her unit, LiGHTs, effectively teaching routines to her peers.

Her primary relationship is with her roommate Ashley, whom she considers her best friend despite their opposing personalities sparking frequent arguments. Lavie stands 152 cm tall with blonde hair styled in small twintails. Her standard uniform includes white socks and black Mary Jane shoes.

Magically, Lavie demonstrates prodigious talent, specializing in physical enhancement magic. She uniquely activates multiple types of magic simultaneously, such as casting both fire and ice in a single activation—a feat that surprises even highly skilled witches. Her combat magic focuses on physical augmentation, aligning with her athletic prowess.