As a Reincarnated Aristocrat, I'll Use My Appraisal Skill to Rise in the World 3 (manga)

Reincarnated as a child aristocrat in another world, Ars Louvent wastes no time in using his “appraisal” skill to recruit promising talent to his side. With the swordsman Rietz, the mage Charlotte, and the bookworm Rosell as his new vassals, Ars begins to see real hope of turning his weak domain around. Yet, the flames of unrest are spreading throughout the empire, and Ars now finds himself facing a different kind of flame altogether: his fiancee!