Dorcas

Originally a mercenary working for a group of bandits Lyn and her friends are fighting, Dorcas defects to Lyn after learning that she is protecting his wife Natalie from the very same people he is working for. When asked why he is working as a mercenary, he responds that he is only doing so to earn money for his injured wife's treatments. Resolving to aid Lyn on her journey to Caelin, Dorcas helps her to defeat Lundgren. Following this, Dorcas returns home to Natalie, where he finds work as a mercenary fighting to protect the area from bandits.

(Source: Fire Emblem Wiki)