The Magical Revolution of the Reincarnated Princess and the Genius Young Lady, Vol. 5 (Manga)

Lainie, the daughter of a baron, is the mysterious girl at the center of the scandal over Euphie's broken engagement. Anis, the reincarnated princess, can't help but feel there's something odd about Lainie, so she conducts a checkup on her-and comes to a shocking conclusion! At the same time, Anis's brother Algard, the prince of Palettia, takes the lead in a grand scheme that'll impact the whole kingdom...
Princess Anisphia has always thought there was something off about the girl at the center of the engagement scandal, Lainie Cyan. So she decides to conduct a physical checkup on her-- and comes to an astonishing conclusion! Now, with Anis, Euphie, and Tilty's help, Lainie gets busy learning to control her special powers, whether they're a blessing or a curse. At the same time, Algard takes the lead in a grand scheme that could impact the whole kingdom...