Stella is a performer/musician who feels like she's in a creatively stagnant job. She is the main protagonist of the film. Despite her on-stage persona, she is somewhat introverted and not very confident. She is also idealistic, naive, and a pushover. In the film, she is manipulated by her manager and being sold as a brand rather than an individual. Around her manager, she is deferential, nervous, and uncomfortable. Despite that, at the end of the film, she makes a breakthrough to find her self-confidence again.

She does not have many lines but the lines that she does have make or break her character. She also has a lot of non-dialogue vocalizations, like running, struggling, etc.

She has a dream manifestation of her younger self that appears in the film and has one line.