Marianne

Early Life
Marianne is the daughter of an unmentioned noble within the Leicester Alliance. At 14 years old, she was adopted by the lord of the remote Margraviate of Edmund.

Academy Phase
Marianne's adoptive father sent a letter to the church with a large donation to keep her Crest a secret. Marianne enrolls in Garreg Mach Monastery Officers Academy in Imperial Year 1180, and joins the Golden Deer how ever Marianne was quietly suffering even contemplating suicide before she met Byleth who pulled her out of her depression along with some other members of the Black Eagles. This leads to her joining the Black Eagles. Because of her self-deprecation she often make people angry at her, especially short-tempered ones like Leonie.

War Phase
Marrianne joins Edelgard's cause on behalf of her adoptive father whose interest is to build up relations with the Empire for political reasons.

Rumors have spread across the monastery of a beast said to kill people in the middle of the night in a forest. Originally known as Maurice, it was rumored that those who bore his Crest would also transform into a hideous beast like him and kill unsuspecting people. His latest descendant, Marianne, has drawn ire from the uninformed masses. Seeing her plight, Byleth agrees to help her confront the beast and slay it if needed, bringing her students for help. In the forest, the beast approaches Marianne and realizes that she bears his crest, but nonetheless attacks her and sends more monster after her and her allies. After a fierce battle, the Beast is slain and he thanks his descendant for finally putting his soul to rest. The sword Maurice originally carried, Blutgang, is found by his corpse, which she takes back to the Monastery. With the sword in hand, the rumors die down as the truth had been revealed as a result of the battle.

After the war Marianne gets married to Ferdinand altough they were very happy Marianne was still quite embaressed over just how much he showed his love for her to other people.

Ending Quote
 Ferdinand announced his engagement to Marianne just after becoming the new Duke Aegir. While he got started restoring his territory, Marianne returned home to study politics under her shrewd adoptive father. When she returned to Ferdinand's side, they were wed, and with her new skills she proved herself to be an asset to the rebuilding effort. Aegir territory flourished under their reign, becoming one of the most prosperous regions in all Fódlan. It is said that Ferdinand commissioned a bronze statue of his wife to honor her, but that Marianne ordered it to be hidden away in storage for eternity.