Byleth

"I will return here someday my teacher, promise me that you won't forget me."

- Edelgard talking to Byleth

Byleth, is a playable character and the main protagonist in the upcoming Fire Emblem: Three Houses. As an Avatar, their name, gender, and birthday are chosen by the player. In voiced cutscenes, they are referred to as Professor. They possess the mysterious Crest of Flames, once held by Nemesis.

Profile
Once a part of a mercenary group lead by their father Jeralt, Byleth is offered a position to teach at Garreg Mach Monastery's Officer's Academy after an unexpected incident reveals power within them. Around this same time they begin to see Sothis, a mysterious girl only they can see, who appears in their mind.

They are offered the position to teach one of the three houses of the Monastery: The Black Eagles, Blue Lions or Golden Deer. As part of training, Byleth at times leads their students into live combat. Byleth specializes in swords and uses the Sword of the Creator as their primary weapon.

Three Houses

 * Byleth/Quotes

Heroes

 * Byleth/Heroes Quotes

Fire Emblem 0 (Cipher)
Byleth is illustrated in the trading card game Fire Emblem Cipher with the following cards:

Etymology
Byleth is a variation of Beleth, a king of Hell. According to Pseudomonarchia Daemonum, Ham, Noah's son, was the first in invoking him after the flood, and wrote a book on mathematics with his help.

Trivia

 * Byleth's default name in Japanese differs slightly between genders, as a male Byleth is spelled "ベレト" (Bereto), while the female is "ベレス" (Beresu).
 * Byleth's artwork shows them wielding the Sword of the Creator.
 * Byleth is the first Avatar character since Mark to not feature a customizable appearance. Their male and female designs are fixed and cannot be edited by the player.
 * Byleth is the first character in Fire Emblem Heroes to be made available either through regular summoning, or via recognition of another game's data. At the launch of Three Houses, Heroes players that play both games on the same Nintendo Account will receive a free Byleth unit.
 * Byleth is the first avatar protagonist of a Fire Emblem game to physically appear in prerendered cutscenes without the use of a hood or other obscuring garb. Prerendered cutscenes in Fire Emblem Awakening and Fire Emblem Fates in which the avatars were present were depicted from Robin and Corrin's respective points of view in order to avoid showing their customizable faces in cinematics that could not support the feature.