In Awakening, the Conqueror class is the personal class of Walhart and is aptly named after his role as a warrior who embarks on a conquest to usurp control over the entire continent. It is similar to the Great Knight class but with higher Movement and more balanced stats, the Conqueror class is outfitted with Swords, Lances and Axes as its weapons of choice. This class is exclusive to Walhart and is completely uninheritable by a Walhart-fathered Morgan.
The class reappears in Fire Emblem Echoes: Shadows of Valentia. It is an Overclass and functions as the promotion for the Hero class, making it exclusive to Alm. As the Overclass of Alm's Hero class, it functions very similarly but with much higher stat growths. The class also grants him the ability to use Bowrange +1, giving him additional attack range for his bows both offensively and as a counterattack.
The Conqueror class makes an appearance in Tokyo Mirage Sessions ♯FE, where it functions as a promotion for Chrom. The class offers superior offense and defensive capabilities.