A Fighter (capitalized) is a battle type in the Metal Shadow universe. It describes an elemancer specializing in close range offense, with secondary specialization in close range defense. Put simply, they are wrecking balls. Their general strategy is to attack without stopping, shrugging off wounds with their bulk. It usually works.
They normally cannot be torn down by magic unless caught by surprise, which would be difficult to accomplish once they enter close range. But as brawling with them physically is usually a bad idea, magic remains the best option. A fast, offensive spellcaster who can perform hit and run tactics, staying out of close range, is their most difficult opponent.