The tag on Pixiv for the girl with a star in her hair is チエル but I don't know Japanese nor do I play the game so I don't know what her tag would be here.

Unbreakable said:

The tag on Pixiv for the girl with a star in her hair is チエル but I don't know Japanese nor do I play the game so I don't know what her tag would be here.

It's Chieru