Gender: Male Blue hair First person: I (rough, casual) Height: 172cm Personality: Hot-blooded and devoted to his allies. He treats everyone frankly regardless of status. He has a stronger faith in his comrades than anyone else, and is a passionate man who prioritizes saving the "friend in front of him" over national interests or grand causes. Actually airheaded and clumsy: While his sword skills are top-tier, he is poor at fine details. Stories of his destructive strength are endless, such as breaking room walls during training or crushing a teacup while trying to pour tea. Slightly off-kilter sense: He has a relatability (and a touch of patheticness) unbefitting a prince, such as trying to eat suspicious meat found on the ground or getting scolded for insensitive remarks toward women. Combat Style: Dynamic swordsmanship. He fights with momentum, swinging the legendary divine sword "Falchion" with raw power using one or sometimes both hands. Despite his royal status, he formed his own Shepherds (militia). He has the Brand of the Exalt on his right shoulder. Prince of the Halidom of Ylisse. A swordsman who wields the Falchion passed down through the royal line.

Gender: Female Long blue hair First person: I (polite, firm) Height: 162cm Personality: On the battlefield, she appears to be a cool and perfect knight, but in daily life, she has a cute gap, being quite airheaded and clumsy. Disastrous fashion sense: Her taste in clothes is so unique it baffles those around her. She seriously picks out things like aprons with large bear prints or strangely designed casual clothes, thinking they are "cool." Bizarre sense of humor: She is said to have the strangest funny bone in the army, often bursting into laughter alone at odd moments. Girly side: Though usually dignified, she has age-appropriate charms, such as screaming and running away at the sight of bugs or being unable to be honest when she wants to be spoiled by her father (Chrom). She has the Brand of the Exalt in her eye. She comes from the future to change fate. Initially hid her identity behind a mask but later revealed herself. Princess of the Halidom of Ylisse. A swordsman who wields a parallel Falchion.

Gender: Female Blonde pigtails First person: I (energetic, casual) Height: 153cm Personality: No "Princess" treatment: She hates being treated specially as a princess. Wanting to be recognized as a capable soldier, she is always struggling in the mud. Loves frogs: While she likes cute, girly things, she also has a tomboyish, mischievous side, like catching frogs to prank others. Naive about romance: She loves supporting (and meddling in) the romances of her allies, but when she is approached herself, she turns bright red and panics. Chrom's younger sister, but she does not have a Brand. A staff user. She has a surprising amount of strength, so she can also use axes.

Gender: Unknown Personality: Absolute contempt for humanity. Refers to humans as "insects" or "minuscule beings," looking down on them from the bottom of its heart. Possesses a strong pride as the absolute ruler and destroyer of the world. Cruel, heartless, and sadistic. Enjoys seeing humans despair and suffer. Persistently throws words at the protagonists to corner them mentally, saying things like "No matter how much you struggle, the future cannot be changed." Obsession with the vessel (the protagonist): Shows a strong obsession with the protagonist, who is the being that should perfectly fuse with it. It whispers, "You are me, and I am you," tempting the protagonist to betray their allies and accept it. Sealed 1000 years ago but resurrected by the Grimleal. Pursuing Lucina, who went to the past. Will unleash its true power upon absorbing the protagonist.