There are a few novels with a single female protagonist that are invincible from the beginning that I can recommend to you ~ The first is "Elegy of a Failed Author", the second is "I Have Countless Protagonists 'Guardian Spirits", and the third is "Douluo: Awakening the Superman Martial Soul at the Beginning". There was also a book called "Invincible Boyfriend." I hope you can enjoy these invincible and refreshing novels to your heart's content! I hope you like my recommendation. Muah ~