Sitri

Sitri is a non-playable character from Fire Emblem: Three Houses. She is the late wife of Jeralt and the mother of the protagonist Byleth. Sitri was a nun at Garreg Mach Monastery. Due to her weak constitution, she rarely left the monastery. She was good friends with the monk Aelfric. The captain of the Knights of Seiros, Jeralt Eisner, would often talk to Sitri after missions and recount tales of old, much to her wonder. Eventually, the two fell in love and married. Sitri became pregnant with Jeralt's child, and gave birth to Byleth on the 20th of the Horsebow Moon 1159. However, shortly after their birth, she mysteriously died. Her body was buried in the monastery cemetery and Jeralt took her wedding ring, holding onto it as a keepsake in order to give to Byleth one day when they wished to settle down and find a spouse of their own.