Yuan Ka-Fai

Plot and/or ending details follow

Yuan (last name unknown) was one of the four heroes of the Kharlan war along with Mithos Yggdrassil, his older sister Martel, and Kratos Aurion. In accordance of a sidequest where he loses an engagement ring, it is believed he was engaged to Martel. After she was killed by a human near the end of the war, he was turned into a Seraph (one of the Four Seraphim of Cruxis) along with Kratos and Mithos. However, Yuan secretly disaggreed with Mithos's ideals because he had heard Martel's true last words, and to fight back against he evils of Cruxis he created the organization of the Renegades to fight back, and his troops are often mistaken for Desians throughout the game.

His second in command is a man named Botta, who dies after Rodyle attempts (and succeds) to flood the Remote Island human ranch in order for the Party of Regeration to escape. Yuan shows no sadness when he hears the news, but it is thought that he may have grieved somewhat. According to some events and plot issues, the Renegades often switch between friend and foe, such as how they give the Party of Regeneration the Rheairds and how you must fight Yuan in a boss battle. The two bases that are mentioned in the game are near Triet in Sylvarant and near Flanior in Tethe'alla.

His two most powerful mentioned attacks are Thunder Explosion (jumping into the air, spining his weapon the 'Swallow', and then smashing it into the ground to create a massive shockwave and damadge anyone surrounding him), and Indignation (The most powerful Thunder spell in the game, in which a pair of angel wings form over the caster and a circle appears around them. A bolt of lightning crashes down for massive damage).

Yuan is voiced by Chris Edgerly in the english version.

Spoilers end here