He has a secret that only few know. He is being watched, always, unseen,unheard. This secret is on the priority of global security. If only he knew what he was truely, what his secret is.
Created in a time of need, he was cast from the pride he was made to obtain, he is a warrior, and a leader.
A once noble man, he was tossed aside and tortured. He is an empty shell of what use to be Human.
A wonderer, a warrior. He is both cursed and blessed, he is feared and loved, but always misundestood.
When was the last time a character caught a cold or flu? Real people get them every now and again even with solid heating and dry interiors. Your characters are out in the cold and wet, and even inside is not always dry and warm. Imagine having to stop your dungeon crawl, sitting in a tight defensive position, while you all are feverish.