Hartmut

Hartmut
Hartmut is most famously known as the founder of Bern and the original wielder of the Sword of Seals and one of the Eight Heroes that defeated the dragons during The Scouring. After founding Bern, Hartmut constructed the Shrine of Seals so to protect his mighty sword from ever falling into the wrong hands. He constructed it so that the sword could only be drawn in conjunction with the Fire Emblem.

Hartmut the Merciful
During the Scouring, man fought dragon in a savage war that the dragons almost won. Using the Legendary Weapons of Elibe, man was able to exploit the dragon's only weakness: their reproductive system. The only dragon that could efficiently produce more dragons was the alpha female, or the Dark Dragon, Idoun. Using the legendary weapons, the eight heroes fought their way into the Dark Dragon's lair and used the mighty Sword of Seals to slay the dragon. However, Hartmut could not deal the final blow. When the Dragon was slain, she returned to her humanoid form, like all dragons, to reveal the body of a beautiful woman. Hartmut could not kill her but could not allow her to reap slaughter on his own species. Hartmut decided to simply seal her away using the Sword of Seals.

This memory was very traumatic to Hartmut and was burned into his mind so profoundly that it served as the memory he passed on through the sword, for all sacred blades can store the memories of their masters. This memory was what Roy saw when he drew the Sword of Seals from its pedestal in Fire Emblem: Fūin no Tsurugi.