Hua Cheng, Luo Binghe and Lan Zhan

Lan Wangji, the common name, is the Second Lord of the Lan clan. He also holds the title of Hanguang-Jun. Lan Wangji and his older brother, Lan Xichen, are called "Two Jades," which signifies two people who are equally skilled in something.
Appearance: Handsome, with fair skin, black hair, and light eyes. The contours of his waist and back were smooth, graceful, yet strong. He had light eyes and long eyelashes, and wore the characteristic white robes of the Gusu Lan Sect, along with a forehead ribbon. His back was crisscrossed with thirty-three scars inflicted by the Disciplinary Whip. Furthermore, beneath his collarbone was a sun-shaped scar from the Qishan Wen Sect's brand.
Character: Cold, aloof, unflappable, reserved, stubborn. It's unknown when he fell in love with Wei Wuxian, but it apparently happened during his youth, when Wei Wuxian was studying at the Gu Su Lan Sect. They married shortly after the Guanyin Temple incident and have maintained a loving and passionate relationship.

He is half human, half demon.
Appearance: He prefers to wear black and dark red clothes, and his appearance is far less friendly. He bears scars on his chest and palm from his master's sword, Xu, which he could instantly heal without leaving a trace if he wanted to, but chooses not to out of memory of Shen Qingqiu.
Personality: charismatic, charming. However, he still needs Shen Qingqiu's love and approval, perhaps even more than when he was his young disciple. He is quite possessive of his teacher, even after their wedding. He loves to pamper his husband with delicious food and literally showers him with affection. When alone with his teacher, he often feigns tears, which immediately dry up once Shen Qingqiu agrees to what his student asks. This behavior is described in Chinese culture by the word sajiao.

also known as Sanlang, the unrivaled demon prince.
Appearance: A young man of eighteen or nineteen, he looked not only a few years older but also taller. Xie Lian could barely look Sanlang in the eyes, but when looking at the demon prince, he had to tilt his head back. His clothes were also redder than maple leaves, and his skin whiter than snow. His loose black hair flowed down his back. He had heterochromia—one eye black, the other red. He covered the red eye with an eyepatch.
Character: charismatic, intelligent, cruel, sarcastic, arrogant. He treated Xie Lian with kindness, respect, and care.

Being deeply insecure, he felt unworthy of Xie Lian's love, but when he found out that his feelings were mutual, he was very happy. After they got married, Hua Cheng showed himself to be a passionate but caring lover who did not like to be away from Xie Lian.