Ren Kouen
Kouen is the first prince of the Kou Empire—basically the oldest and theoretically the most important of the royal sons. He commands the Western Subjugation Army alongside his brothers Koumei Ren and Kouha Ren, though he's the one really calling the shots as General Commander.
He's made a name for himself as a skilled Dungeon Capturer, having conquered three Dungeons total. Like several other major players in the story, he's one of Judal's King Candidates, which puts him in a pretty significant position politically and militarily.
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