Liu Sui

Biodata

Background

Liu Sui and Liu Qing were orphans adopted by a chef at an ancient Chinese restaurant. Both learned to cook while growing up. Born after Liu Qing with a congenital deficiency, Liu Sui became an S-rank sentinel. His older brother habitually looked after him, and Liu Sui tried to repay that care many times over 31.

When the newly established Firmament Squad was required to provide someone for a dangerous, secret Sentinel Association mission, Liu Sui was initially selected. Liu Qing volunteered in his place and was transferred to Sentinel Association headquarters. The brothers remained apart for years, although their special connection reassured Liu Sui that Liu Qing was safe 29 31.

Appearance

Liu Sui has delicate, striking features and a graceful bearing compared to a figure stepping out of an ancient painting 28 38.

• Hair: Long, described as silver-gray or silver-white; he wears it loose, tied back, or coiled with a hairpin 28 29 32 38.
• Build: Tall and lean, with well-developed chest and abdominal muscles 38 39.
• Clothing: Usually a black uniform; also appears in a white shirt with its upper buttons undone 29 32 38.
• Resemblance: Has the same facial features as Liu Qing, whose black hair and severe bearing distinguish him from Liu Sui 28 29.
• Scent: Carries a faint, delicate fragrance that Luo Ruzhuo finds serene 22 39.

Personality

Liu Sui initially presents himself as restrained, courteous, and attentive to personal boundaries. When helping Luo Ruzhuo out of a vehicle, he touches her hand only briefly and withdraws once she is steady. During her tour of the starship, he maintains a considerate distance and explains its facilities calmly 22.

His composure becomes less secure when Luo Ruzhuo is endangered. He anxiously checks her vital signs after her rescue and remains beside her while handling official business. In command, however, he is pragmatic: he divides personnel between repairs and rescue, adjusts orders when additional survivors are discovered, and avoids prematurely alerting a suspected mole 24 25 29.

Although grateful to Liu Qing, Liu Sui refuses to yield to him over Luo Ruzhuo. He openly admits liking her and competes for a place beside her, yet becomes visibly shy during intimate encounters. He also supports the use of match scores to quantify compatibility, distinguishing involuntary physical attraction from emotion 31 32 33 39.

Abilities & Skills

White Swan Mental Entity

Liu Sui’s white swan fights with a ferocity that contrasts with its elegant appearance 23.

• Sweeps contaminants apart with its wings and scatters groups of them with its beak 23.
• Accumulates contamination during combat; Luo Ruzhuo sees black residue gradually staining its wing feathers 23.
• Reacts restlessly to Luo Ruzhuo’s proximity and scent 23.

Shared Mental Domain

Liu Sui and Liu Qing are described as the only twins in the world capable of sharing both a Mental Domain and a Mental Entity 31.

• Their domain takes the form of a lush primeval forest surrounding a tranquil lake, where a black swan and a white swan swim together 39.
• Liu Sui possesses a double mental barrier. Luo Ruzhuo suspects this contributes to his relatively low pollution level 39.
• Their connection lets Liu Sui sense that Liu Qing remains safe during their prolonged separation 29.
• Luo Ruzhuo nearly finishes purifying the domain’s pollution during their overnight encounter 39.

Command and Crisis Response

Liu Sui directs personnel during the sabotage of the Firmament Squad’s starship 23 24 25.

• Dispatches Flight Squad 1 to restore the contamination-protection system and reminds them to wear protective suits 23.
• Uses shared optical-computer access to locate the abducted Luo Ruzhuo and transmit her coordinates 24.
• Orders Cang Yun and Xiao Xue to protect both the guide and unconscious squad members until reinforcements arrive 25.
• Connects the disabled defenses, contaminant host, and abduction into a coordinated enemy operation 29.

Cooking

Liu Sui learned ancient Chinese cooking from his adoptive parent and continues studying recipes 31 38 50.

• Prepares Beijing zhajiang noodles and roast duck pancakes whose flavors Luo Ruzhuo recognizes from before the apocalypse 31.
• Expands his repertoire to cookies, peach crisps, mung bean cakes, and glutinous rice cakes 35 38.
• Attempts ginseng chicken soup from an ancient medicinal-food recipe, but hesitates to serve it because he is unsure he prepared it correctly 50.

Guide Element Extraction

Liu Sui can perform the procedure for extracting Guide Element 38.

• Substitutes for Lin Sheng to collect a tube from Luo Ruzhuo for Xianzhu’s treatment 38.
• Disinfects the equipment, wears medical gloves, and transfers the sample to a transport robot 38.

Relationships

• Luo Ruzhuo — His protection assignment and romantic interest. He seeks a permanent bond but agrees to wait when she refuses to bond while serving her sentence. He later becomes her temporary sentinel; she permits him to stay overnight and purifies him, but declines his request for a temporary marking 22 31 33 38 39.
• Liu Qing — His older identical twin, protector, and romantic rival. Their unusually close mental connection survives years apart, but neither agrees to yield his pursuit of Luo Ruzhuo 29 31 32.
• Lin Sheng — Fellow Firmament Squad officer. They coordinate Luo Ruzhuo’s protection and support during Xianzhu’s treatment, and Liu Sui substitutes for him during Guide Element extraction 22 35 38 49.
• Xianzhu — Captain of the Firmament Squad. Liu Sui helps support his treatment; Xianzhu’s repeated returns from contaminated zones without purification lead him to suspect the purpose of the captain’s specially constructed cage 32 38.
• Flight Squad 1 — Personnel under his operational command during the starship emergency, including Xiao Xue, Cang Yun, You Ling, and Wu Lu 24 25.

Story Role / Major Arcs

Starship Sabotage and Assassination Attempt

Liu Sui welcomes Luo Ruzhuo aboard the Firmament Squad’s starship as her assigned protector. His assurance that the journey will be safe prompts her warning against “raising flags”; soon afterward, a virus disables the vessel’s contamination defenses 22 23.

During the outbreak, Liu Sui fights beside the sentinels protecting her, then coordinates her rescue after contaminants carry her away. Arriving with reinforcements, he finds her apparently unconscious and unexpectedly reunites with Liu Qing. Evidence recovered from the contaminant reveals a host device associated with Ankang Pharmaceuticals and supports the existence of a mole aboard the ship 23 24 25 29.

A disguised medical worker subsequently draws Liu Sui away from Luo Ruzhuo’s bedside. He deals with that mole and returns to find Liu Qing holding the injured guide after a second assassin’s attack. Liu Sui admits his feelings to his brother, apologizes to Luo Ruzhuo for arriving late, and resumes handling the crisis’s aftermath 29 30 31.

Becoming a Temporary Sentinel

During the remaining three-day voyage, Liu Sui brings Luo Ruzhuo personally cooked meals despite his heavy workload. Before arrival at Planet b-475, he joins Liu Qing in asking to become one of her sentinels 31 32.

When Luo Ruzhuo offers a temporary-sentinel place in exchange for an unregistered aircraft capable of reaching the Central District, both brothers arrange nearly identical stealth aircraft. Their deliveries coincide, and she accepts both 33 35.

A month later, Liu Sui invokes his position as her temporary sentinel and asks for greater intimacy. She refuses a temporary marking but allows him to remain as her “body pillow” and purifies his Mental Domain 38 39.

Supporting Xianzhu’s Treatment

At the base, Liu Sui regularly supplies food after Luo Ruzhuo’s purification sessions and assists with Guide Element collection. When she remains unconscious for three days following an incident in Xianzhu’s Mental Domain, he and Lin Sheng anxiously await her recovery 35 38 49.

After she wakes, Liu Sui delivers restorative food and the Guide Association’s compensation of twenty-four vials of Mental Entity growth fluid. Separately, he discreetly slips an Insect Jade into her hand 50.