Jesse Fanel
Jesse had complications during birth which caused his immune system to be weak and him to be a mute.  His mother was killed when he was a baby, so he never knew her or his father, who left shortly after his birth.  He, his brother, and his sister were taken in by Lysia and grew up to be part of the Guardians.  He's an excellent swordsman and he is able to hear things most people can't.