Faye

Faye is one of Alm's childhood friends from Ram Village. Growing up alongside Alm, Tobin, Gray, Kliff, and Celica, the group were incredibly close. One day, the children saw several knights approach the village, the first ones they had ever seen. These knights were led by Slayde, who attempted to kidnap Celica and kill Faye. Thanks to a an attempted intervention by Alm, and a timely rescue by Mycen, the children were saved. This event caused Celica to leave the village for her safety. Over the course of the years, Faye trained under Mycen in combat. Being so close to death was a traumatic experience for Faye, and her love and obsession over Alm grew since that day.

(Source: Fire Emblem Wiki)