About:
Children of a Fire Demon
More looking Has robotic arms
Like a demon

Story:
Both have the same story because they are close brother and sister. They escaped from their home after doing a cruel acts to people. And they hid in towns, moving town by town until they met Masky in the woods, hunting. Masky was kind enough to give them some of the animal that he hunted and welcomed them to both stay at the groups home, which they don't really mind at first. Then to blend in more, they were given gears to hide most of the demon features and both have the most in their mouths which is covered by a mask. They both thanked them for the awesome stuff they have given to them. And they help them with their adventures with some difficult tasks to do.

Strongest:
                              Fire
                            Armor

Weakness:
                    Some Sacred artifacts