My daughter wears a shirt that she calls her Supergirl shirt. The character printed on it looks like no version of Supergirl I have seen. See image below.
Judging from the dashing cape and power pose, I assume she's meant to be a superhero. The shirt is secondhand, so if there was ever any copyright information, it's faded away. Web searches for things like
pink caped superhero and
superhero star s turn up nothing that resembles her.
Is she an actual superheroine with a backstory, comic, and special powers, or just a generic character created for kids' clothing?
Edit: This is the only labeling I can find. The shirt is a long-sleeve.