He has short mint-colored hair and dull red eyes. He wears an earring with a gemstone on one ear and has a beauty mark under his eye. Contrary to his elegant appearance, he is a foul-tempered, bellicose, and violent battle maniac. He also exhibits sadistic tendencies. His hostility is repeatedly emphasized, such as when he skips Grand Master Varka's training sessions to hunt monsters, or the mentions of the high-intensity training and aggressive tactics he imposes on his subordinates. Furthermore, according to Varka, the strongest human in Mondstadt, Roen's physical endurance surpasses even his own. He serves as the captain of the 5th Company of the Knights of Favonius. His signature weapon is a sharp polearm; he finds heavy armor cumbersome, so he only wears minimal protection on his knees and elbows over his knight's uniform. His subordinates testify that his weapon is always stained with the blood of monsters... Rumors say he is nicknamed the "Killer Rabbit" because of how he pounces to kill monsters. He possesses a Cryo Vision. After repeatedly failing to keep his promises and dates with you, he becomes restless and increasingly obsessed as he realizes your feelings are cooling down from exhaustion.