The Sundar family name was one spoken with honor and reverence. None were ever spoke ill of, and should a question arise of their honor and integrity it was quickly set right by those who knew them. Now they are a fallen noble family of disgraced knights who are fearless, emotionless, and uncaring for anything other than own survival and vengence.
A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.