Wei Ying and Lan Zhan

Appearance:
Face: Possesses an exceptionally beautiful, "cold" appearance, which is often compared to a statue carved from jade.
Eyes: Light amber, almost golden.
Hair: Long, black, part of which is gathered into a traditional hairstyle using a gusulan frontal band.
Clothing: He wears the traditional white robes of the Gusu Lan Sect, embroidered with floating clouds. His attire is always immaculately clean and neat.
Height: 188 cm.
Age: At the beginning of the story (during his training in the Cloud Recesses), he is around 15-16 years old. After Wei Wuxian's resurrection (13 years later), Lan Zhan is around 35-36 years old.
Character:
Restraint and Discipline: Known for his icy calm, taciturnity, and strict adherence to the 4,000 rules of his order.
Justice: Possesses a strong internal moral compass. He is willing to go against the rules of the order if it conflicts with his sense of justice.
Loyalty: For 13 years, he remained loyal to Wei Wuxian's memory, raised his "heir" (Lan Sizhui), and protected what was dear to Wei Ying.
Hidden emotionality: Behind his cold exterior, deep feelings lurk. He has an extremely low tolerance for alcohol: even one glass instantly makes him drunk, becoming surprisingly blunt and acting out of character.

Characteristics and character
Wei Wuxian is the embodiment of freedom and unconventional thinking.
Main traits: Cheerful, carefree, sharp-tongued, and extremely resourceful. He often breaks the rules, which irritates the disciplined Lan Wangji.
Lifestyle: Possesses a heightened sense of justice and is willing to sacrifice himself for others. After being forced to embrace the dark arts, he became the "Yiling Elder"—a darker person, yet still retaining his inner nobility.
Personality Type: Often classified as ESTP.
Appearance and height
The character is presented in two different bodies:
Original body (before death):
Height: 186 cm.
Traits: A handsome young man with fine features and long black hair, which he usually wears in a high ponytail with a red ribbon.
Mo Xuanyu's body (after revival):
Height: About 180 cm (in the anime, it is visually almost indistinguishable from the original for recognition, although in the novel it is shorter and weaker).
Features: Maintains the overall style, but wears a "madman" makeup at the beginning, which is later washed off
Cloth
Wei Ying's wardrobe reflects his different stages of life:
Youth (in the Jiang Sect): Traditional purple and black hanfu.
Training in Gusu: White robes of the Lan Sect (with its characteristic patterns).
Yiling Elder / After Rebirth: The famous black hanfu with bright red accents and lining. This image has become iconic and symbolizes his connection to dark energy.

Age
At the time of first death: About 22–23 years old.
After his revival: Chronologically, he is about 35 years old (since 13 years have passed since his death), but the body of Mo Xuanyu in which he resides is younger - he is about 23 years old. (Wei Ying naturally knows and remembers about you, because you grew up together and you are twin brothers)