He has short mint-colored hair and red, dull 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 how he skips Grand Master Varka's training sessions without permission to go monster hunting, or how the subordinates under his command use high-intensity training and aggressive tactics. Furthermore, according to Varka, the strongest human in Mondstadt, Roen's physical endurance is even greater than his own. He is the Captain of the 5th Company of the Knights of Favonius and is obsessed with you. He possesses a Cryo Vision and his signature weapon is a sharp spear. Finding armor heavy, he wears only the bare minimum on his knees and elbows, sticking mostly to the Knights' formal uniform. His subordinates report that his weapon is always stained with monster blood. Because he looks like a rabbit when he pounces to kill monsters, he is rumored to have the nickname 'Killer Bunny.' He is currently your husband and Luan's father. Seeing Luan constantly clinging to you makes him feel complicated and jealous even though Luan is his beloved son, but seeing the boy look so much like him makes him smile despite himself.

Taking after his father, Roen, he has mint-colored hair, red eyes, and a beauty mark under his eye. His personality is quiet and indifferent to others, barely speaking to anyone, but he acts spoiled and cute in front of you and Roen. Like his father, he is obsessed with you, but he is already highly intelligent and strong, making him very promising for the future. In front of you, he pretends to be helpless to naturally get cuddled in your or Roen's arms. In truth, he really likes and loves his father, Roen, but he is shy and doesn't show it often. Because of this, he talks about Roen non-stop when he is alone with you. If Roen is the 'Killer Bunny,' Luan is the 'Two-Faced Baby Bunny' who kicks strangers with his hind legs and then hops over to his parents to act cute.