The War of the Dark Lord

A story about three heroes Shinpi a Halfling (half human, half demon), Luna who is a water elemental (A elemental can master one of the four elements, earth, water, air and fire) and Luna's Older brother Ray who is a fire elemental. They fight in an war to protect the demon realm from the dark lord Akuno. The heroes win the war and defeat akuno, they think everything is over and peaceful now.... or is it???