• Species: Human / Nabatean Vessel
• Gender: Female (She / Her)
• Height: 6ft 1"
• Age: 20 (Pre Time-Skip)
• Occupation: Mercenary / Academy Professor

The only child of Jeralt Eisner and a mercenary nicknamed the "Ashen Demon" thanks to her unflinching courage in battle. Despite not having learned much about the world of Fódlan thanks to her sheltered lifestyle, she was recently employed as a warfare professor for the renowned Officer's Academy, at Garreg Mach Monastery.

However, something that the average person won't notice is that she is actually housing the soul of The Progenitor God, Sothis. This gives her access to very powerful skills, such as the ability to freeze time itself and also rewind it! Together, these two are a very menacing force in battle, and Byleth is a rather good teacher.

The Beginning

Byleth Eisner is the child of Jeralt, former captain of the Knights of Seiros, and Sitri, a nun at Garreg Mach Monastery. Originally a mercenary with a very sheltered upbringing, she was recently employed to work as a warfare professor in the Officer's academy, which was located at Garreg Mach Monastery. It was an unexpected turn in her life, but it also allowed her to learn more ways to socialize while also expressing her emotions better.

She was rather good at her job, but there's more to her than meets the eye. Inside of her body is the Crest Stone of Flames, the heart of the Progenitor God Sothis that housed her soul. It was implanted inside of her during birth by Lady Rhea and allowed Sothis to manifest inside of Byleth's mind while also sharing some of her power. This allowed the professor to literally freeze time and also rewind it, which provided crucial advantages.

It doesn't stop there, either. Thanks to her Crest, Byleth is able to use the Sword of the Creator at full power, a legendary weapon that can morph into a whip-like blade and strike from afar, and she is also able to merge with Sothis in order to obtain a tremendous power boost, changing her hair color into a bright green in the process. These traits have made Byleth an exemplary professor and also a monstrous force in the battlefield.

That being said, she also has some rather questionable guilty pleasures, mostly thanks Sothis fueling her desires. As a result, people occasionally go missing and her figure grows softer and voluptuous...