Erdwin (ローシュ, Rōshu?) is an important character to the story of Dragon Quest XI. He is the original Luminary, a courageous hero that was created by Yggdrasil to defeat the Dark One long ago and restore peace to Erdrea. In the present, the Hero is his reincarnation.
Erdwin is a physically fit young man of average height with blue eyes and very spiky black hair. He wears a silver coronet with a blue gemstone and one of his forelocks falls over the headpiece. His outfit consists of a long sky blue tabard with gold edges and the Mark of Light embroidered on the front in red and gold over a black long-sleeved tunic, yellow trousers, leather gloves, leather boots, and metal bands worn on his biceps. He also wears two brown leather belts with gold buckles around his waist and one across his shoulders with a scabbard strapped on his back.
In the Japanese version, Erdwin's name Rōshu is similar to Rosh, a Hebrew word meaning "head" or "leader". Rosh is a minor Biblical figure mentioned in the Old Testament. His name in the English and Japanese versions of the game is meant to evoke the legendary hero from the third game, Loto/Erdrick.