The old leader of Viper Mansion might appear to be a villain, but a quick talk with the people of El Nido would show that he is a well-loved governor to the people, a kindly leader to the Acacia dragoon, and a caring father to Riddel. But the temptation of the Frozen Flame was too strong for a man seeking a way to defend his territory from invaders, and Lynx was able to manipulate him to his needs. After learning how wrong he was for trusting the demi-human, Viper would later try to atone for his judgmental errors by seeking Lynx to pay for his crimes.
While Lord Viper is an old coot, he is a veteran of the battlefield and had once been the leader of the Deva Dragoons. With the feared might of the Viper Sword, and a strong patriotic heart guiding him to victory, any who oppose him will find a swordsman who's powerful despite his age.