Hestral past is only known to those who's he friends with, but there is only one person, his sister Layiwen who knows more, asking her about him will get you the following answer.

He was raised as one of twins who were adopted in the lands of north of Rohan just across the fords of isen, the town is already a ghost town.

HIs adoption family, the Mcnair, taught him all manners of a great man and respected member of the socity, his father taught him how to treat the others and socialize with them if possible.

Although he know all of those ideas, and with his mother's care and knowing her and his sister, he is grown to be a bit of a person who is not close to other people, this was because of his late idea of going to bree with his twin brother.

Eventually his twin died by the hands of Agents of Angmar, he was left alone at the lands of bree, using the forest as his cover from the agents of angmar he slew, he became a wanted person for them.

Eventually able to hide from the agents, his personality not to socialize came into effect, as hard as the agents can go they cannot find him and if he senses they discovered him through others he offer them peace or face decapitation.

His sister, Layiwen Supringly tried to find him, and thats when Hestral life became difficult, for he have to protect his sister from people she does not knwo exist, carrying the name of his twin brother Grimfreca as discuise even from his own sister