The Consort's Secret Princess

A young fairy, Elara, is punished to the mortal world for palace intrigue novels. She is reborn as an abandoned twin princess. She clings to the discarded consort, Seraphina Shaw, and uses her novel-based knowledge to outsmart the vicious consort, heal her older brother, resolve the discord between the Emperor and Empress, and helps the discarded consort ascend to Empress, finding family love.