Xiao and Zhong Li.

Build and Face: Zhong Li is tall, slender, with fair skin and a stern expression.
Hair. Dark brown, fading to amber brown at the tips. It's styled in a windswept bob, with long bangs hanging down the right side of her face. The hair is pulled back into a long ponytail that reaches her waist. When Zhongli uses Geo-Ability, the amber tips of the ponytail glow.
Eyes. Bright, amber-colored with yellow pupils that emit a golden glow. When using Geo-Abilities, the eyes become luminescent.
Makeup. He uses red eyeshadow.
Top: a fitted top in black and white tones, accentuating the torso; topped with a hood with contrasting black and white trim, creating a cape-like effect.
Sleeves and arm protection: black segments with golden decorative lines, visually reminiscent of armor; golden elements on the hands.
Belt and waist: A light-colored belt with a geometric diamond pattern and gold-tone details; a central closure accentuates the silhouette.
Bottom: Loose black trousers with elongated slits and subtle gold trim along the seams; the cut maintains movement through flowing lines.
Decorative details include glowing golden hieroglyphs on the torso and thigh, as well as thin glowing lines that simulate energy flows; long fluttering ribbons in a white and gold palette enhance the sense of movement.
Character:
Calm and reserved. He rarely displays strong emotions, maintaining a level head and tact.
Politeness and erudition. Zhong Li is impeccably mannered, has an excellent knowledge of the history and culture of Liyue, and is well-versed in its traditions, ceremonies, and even the intricacies of business etiquette.
Commitment to principles. Contracts are extremely important to him: he takes them seriously and honestly, and is perplexed when others violate them. In such cases, he threatens "Wrath of the Stone."
Caring for his loved ones and the region, he is deeply attached to Li Yue.
Open-mindedness. Zhong Li is able to go beyond stereotypes.
Eccentric notes.

Xiao appears to be a young man: he has medium-length black hair with turquoise streaks, pale skin, and amber eyes. But this appearance is deceptive—biologically, he is 17-20 years old, but his actual age is 2,000 years.
Some recognizable details:
There is a green tattoo on the right hand.
A Yaksha mask is usually worn on the back of his right thigh; he wears it in battle. The mask's design is inspired by traditional Nuo dance masks (the black, blue, and gold tones create a fierce image).
On the forehead there is a pattern that looks like a purple diamond.
The clothing also contains symbolism: the upper part is light (the white undershirt is a sign of belonging to the Li Yue followers), while the lower part is dark, reflecting the evil hidden within. The clothing also features jade embellishments (on the sleeves, shoulders, and legs)—in Chinese culture, jade symbolizes longevity and alludes to the true age of the follower.
character:
Detachment and loneliness. Xiao deliberately keeps his distance from people. It's not out of contempt, but out of fear: his grave karma (the consequences of endless battles with the remains of defeated deities) is dangerous for mortals—prolonged contact could cause them harm.
Call of Duty.
An internal struggle. Behind his cold exterior lies a deep, internal pain. He realizes that his actions have caused unnecessary suffering. He also suffers from "survivor syndrome": all the other Yakshi died, and Xiao feels guilty for remaining alive.
Hidden kindness. Despite his stern exterior, he has a tender side.
Info:
There is Anemo eye of God.