I Became a Herrscher Girl, But My Brother Thinks I'm Just Another Spirit to Save

One transmigration, one cosmic joke. I was supposed to be Shido's wingman—help him save Spirits, then live the easy life as a Fraxinus desk jockey. But the Aeon of Elation had other plans. Now I'm a phoenix-born Herrscher trapped in an Elf's body, wielding reality-bending powers in a world that thinks I'm just another damsel in distress. My brother's sealing kiss worked on every other Spirit. Surely he won't try it on me... right?