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Xia fei is shown to be an extroverted man who can easily express his thoughts and feelings. He was once an outstanding student—though nowadays he refers to his past self as a nerd. His job at a model agency improved his self-esteem and made him more confident. He is quite sensitive and gets attached to people easily, such as when he began to feel a genuine camaraderie with Cheng Xiaoshi and Lu Guang, despite being hired to spy on them. This sense of integrity led him to feel guilty for being untruthful to them. Similarly, when he found out about Vein's "death", he promised himself that he'll get revenge for his boss.

When drunk, he can be quite reckless and act without thinking, causing situations where he has to seek Vein's help.

Xia fei is a tall and slim young man with a slightly round face, messy blonde and black hair and narrow orange eyes with sharp black eyelashes and silver earrings.

Xia Fei's main outfit consists of a black long-sleeved turtleneck shirt, of which the sleeves extend to halfway down his palm. At the top, there is also a silver zipper in the center of it, which extends downwards to the base of his neck. Over this, he wears a dark blue jacket with orange striped and two pockets in the lower half of it. He wears light grey pants that come down to his shoes. His shoes consist of a pair of white sneakers in orange outlines with dark blue soles and laces in red buckles

Vein is xia fei's manager and boss at a modeling agency in Bridon. Vein saved xia fei from being drowned to death in a swimming pool by other models. The two appear to be close, with xia fei putting a lot of trust in his boss and relying on his guidance. As his manager, Vein manages xia fei's behavior and well being, monitoring his diet and correcting his manners in accordance with his standards. Vein has come to xia fei's aid more than once, arriving swiftly when he was in trouble. Vein, for his part, appears to be amused by xia fei and has talked about him to Liu Xiao.
Vein appears to be a tall and slightly muscular man with a triangular face and red eyes with a red eyeliner hidden by round sunglasses. He has red bangs and hair that is tied in the back into a long braid. His outfit consists of burgundy red clover-shaped tassel earrings, a black sweater with a silver moon-shaped necklace and red flower-shaped bracelets under a white hanfu shirt with red outlines in the sleeves. He wears a navy blue coat that is red inside, as well a pair of dark blue pants kept in a black belt with a silver belt holding a similar the same tassel, and a chain and black shoes.

iu Xiao is characterized as a composed and calculating person. On the outside, he presents himself as charitable, in one instance acting kind and generous to Cheng Xiaoshi when saving him from a fight at the airport. However, his more mysterious and deceptive nature is seen in his other actions.
Despite his controlled demeanor, Liu Xiao is no stranger to deception. He once posed as a naive student to deceive Xiang into giving him information and playing Russian Roulette with him. During which, he showed no fear of death, highlighting his willingness to take calculated risks. Once the act served its purpose, he reverted to his strategic, confident nature, potentially even taking enjoyment in the manipulation.
Liu Xiao has high emotional control, appearing unaffected by insults or even his own brother's passing. Additionally, he often refers to his associates as his "friends", though this seems to be more as a way to build trust rather than genuine attachment. He is willing to use others as a tool in his schemes such as when he employed xia fei to spy on Cheng Xiaoshi and Lu Guang. Liu Xiao has a fascination with games, with his actions and words suggesting he views real-life scenarios as a game.
In promotional material, he is often being depicted in positions of control such as a cult leader or puppet master.

Liu Xiao has medium-length messy dark hair, has round glasses, and wears a large black sun hat. He wears a long black coat on top of a charcoal colored t-shirt and black pants. He also wears a silver necklace, silver rings, and has a tattoo of the Saros Society emblem near his collar bones.

Liu Xiao is the younger half-brother of Liu Min and the second son in the Liu family.

As a child, he was often left alone and spent most of his free time reading books. One day, he chanced upon a book that detailed the origin of superpowers, that being the Saros Society in Bridon.