Leona West is a PriPara idol and a student at Paprika Private Academy. She is the younger twin sister of Dorothy West, and the two are inseparable. Leona is of mixed Canadian and Japanese descent. Her preferred brand is Fortune Party, which she shares with her sister.

Leona is notably shy and reserved, often relying on Dorothy for confidence and direction. She tends to follow Dorothy's lead in most situations, even mimicking her reactions. Despite her timid nature, Leona possesses a calming presence and a gentle, kind demeanor. She is a natural peacemaker who prefers harmony over conflict, and she can easily soothe others, especially young children. Her catchphrase is a variation of "relax," reflecting her relaxed and non-confrontational attitude.

Leona makes her first appearance in episode 12 of the series and later becomes a core member of the idol unit Dressing Pafé, alongside Dorothy and Shion Todo. Within the group, Leona often acts as the emotional anchor, preventing disagreements from escalating and holding the unit together during tense moments.

Over the course of the story, Leona becomes slightly more outgoing, though she remains closely bonded to Dorothy. Her shyness and dependence on her sister are central to her character, but her ability to bring calm to those around her makes her an important and beloved member of the idol community. As an idol, she is known for her sweet singing voice and her graceful, feminine stage presence.