Ferdinand Von Aegir

Ferdinand is the eldest son and heir of House Aegir, which has held the office of prime minister of the Adrestian Empire for centuries. When he was 9 years old, his father, Ludwig, seized power in the Insurrection of the Seven, rendering Emperor Ionius IX politically impotent. He is very proud of his family's status as high-class nobility, but clashes with his father about what nobility actually is and means.

Ferdinand is a confident and proud noble that hates losing. He is fiercely competitive, in particular with Edelgard. He strives to be Edelgard's better, as he believes that will prove his worth as a capable prime minister to assist her in her rule as Emperor. Over time, however, Ferdinand comes to accept that Edelgard is and always will be better no matter how much effort he applies. While saddened at this, he does not let it discourage him and wishes to continue improving for his own sake.

(Source: Fire Emblem Wiki)