Yu Xian

Biodata

Feature	Information
Name	Yu Xian (余贤)
Alias(es)	Salty Fish (Qilin codename); “Silver-Sucker” (Nora's nickname) 13 27
Species/Race	Wild Vampire; formerly human
Gender	Male
Age	17; his body remains physically seventeen after his First Embrace 12 37
Affiliation	Qilin; Demon-Slaying Squad
Occupation/Role	Superpower Academy student; Qilin field operative
Rank	Officially classified as Ant Rank 50
Status	Alive
First Appearance	Chapter 1, “Light Eater”

Power Progression

Stage / Realm / Level	Chapter	Notes
Wild Vampire / Light Eater	1	Injects third-generation vampire blood to cure hereditary ALS. Unlike ordinary vampires, he absorbs electric light and sunlight as nourishment rather than feeding on blood.
First minor talent: Blood of Silver	3, 4	Awakens after his tenth heartbeat. He can consume silver, convert his blood into Blood of Silver, resist silver's usual suppression of vampire healing, and form metal-like blood weapons.
Enhanced Silver Blood state	7	Consumes Nora's silver dagger, transforming a substantial portion of his blood into Blood of Silver. His senses and physical ability increase sharply; his body can also become a light-absorbing black form.
Blood Energy	16	Awakens the energy required for blood magic. With no Blood Clan or Blood Elf teacher willing to instruct a wild vampire, he begins developing techniques independently.
Self-developed Blood Energy techniques	17, 26	Develops adhesion, corrosion, weapon shaping, elastic bubbles, enhanced mobility, and reinforcement for his silver threads and armor.
Pangu Blood mutation / Two Hearts	33, 34, 35	Drinking Pangu's Blood perfects his incomplete blood-memory talent, mutates his Blood Energy, and gives him a second heart: Pangu's Heart.
Spatial Bubble ability	34, 37	His mutated Blood Energy forms durable, spatially fixed Bubbles with adjustable properties such as hardness, elasticity, adhesion, corrosion, and vibration.
Pangu's Spirit Pearl Divine Ability mutation	48	Awakens Pangu's Spirit Pearl Divine Ability, but its energy merges with his mutated Blood Energy instead of forming a conventional spirit pearl. His Bubbles become stronger, interconnected, and usable for teleportation.

Background

Yu Xian was a high-school student suffering from hereditary ALS who had inherited a small factory. Unable to afford conventional supernatural treatment, he used the black market to purchase third-generation vampire blood. He knowingly accepted becoming an illegal, unregistered vampire because death from ALS was otherwise imminent 1.

The injection stopped his heart and transformed him into a vampire. Rather than suffering the Blood Clan's normal dependence on blood or vulnerability to sunlight, Yu Xian discovered Light Eater, a talent that allows him to consume light. Sunlight can restore enough energy for one heartbeat in roughly half a day, allowing him to awaken vampire talents far faster than ordinary vampires 1 2.

He returned to Silver City No. 3 Middle School to preserve a believable human identity. He believed that attending class in daylight would make him appear more plausibly like an elf-blooded human than a wild vampire 2.

Appearance

After becoming a vampire, Yu Xian gradually develops the refined features, slender build, and lean physique associated with vampires. His body is exceptionally dense and durable despite his outwardly thin appearance 2 26.

• Physically remains seventeen following his First Embrace 37.
• Can turn his body into a near-black, light-absorbing form that is difficult to see in darkness 7.
• Can manifest smooth, mirror-like silver armor over his body through Blood of Silver and Blood Energy 30.
• His right arm regenerated overnight after Zhou Tai severed it; the replacement arm is more symmetrical with his left arm than the original 11.

Personality

Yu Xian is cautious, practical, and intensely afraid of death because he watched his father suffer from ALS. That fear initially drives his decision to become a vampire, but it also makes him value life and prepare carefully for danger 1 6 15.

He conceals his identity, avoids needless risks, and often considers costs and consequences before acting. Even so, he refuses to abandon his humanity: after discovering the Aberrant Insect infestation, he chooses to alert the authorities despite the danger of exposing himself as a wild vampire 4 6.

Following the Silver City massacre, Yu Xian decides that mere immortality is not enough. He resolves to become a “light” that protects ordinary people from fear, and begins treating strength, training, and Qilin missions as responsibilities rather than simple means of survival 15.

Abilities & Skills

Light Eater

Yu Xian's unique initial vampire talent allows him to consume light as nourishment.

• Absorbs light from electric bulbs and sunlight rather than requiring blood 1.
• Sunlight restores his stamina and accelerates his recovery dramatically 2 16.
• His rapid light intake causes frequent heartbeats, which advance his vampire talent progression 2.
• Can enter a black, light-absorbing state that improves stamina recovery and makes him difficult to perceive in darkness 7.
• He can still drink blood, but artificial plasma intoxicates him through Blood Drunkenness and can leave him unconscious 11.

Vampire Physiology

His transformation cured his ALS and granted him the baseline capabilities of a vampire.

• Possesses enhanced strength, healing, smell, vision, and night vision 2.
• Can heal ordinary injuries almost instantly and regrow severed limbs with sufficient energy 10 11.
• Has no normal heartbeat, making him immune to Zhu Yan's heartbeat-based war-drum ability 30.
• Ordinary food tastes like wax and cannot be digested, although he sometimes eats it to accept others' kindness 2 11.
• His body becomes stronger with continued light absorption; by early in his transformation, a one-armed punch could exceed one ton 3.

Blood of Silver

Blood of Silver allows Yu Xian to consume silver and convert his own blood into a special metallic substance.

• Ignores silver's usual burning effect and its suppression of vampire healing 4.
• Converts consumed silver into Blood of Silver, enhancing his senses and physical performance 4 7.
• Forms sharp, resilient silver threads and whips that move according to his will 4 7.
• Silver threads can cut through aberrant insects, walls, steel, and large arena barriers 7 30.
• His control initially depends heavily on his hands and fingertips; losing his right arm greatly reduced his thread combat ability until it regenerated 15.
• With refinement, he can rapidly create silver gloves, trench-coat-like protection, and full-body armor 25 30.

Blood Energy

Blood Energy is the foundation of vampire blood magic. Yu Xian develops his own methods because established vampire groups will not teach a wild vampire 16.

• Produces adhesive energy that lets him cling to walls and ceilings.
• Reinforces silver threads and can make them adhesive like spider silk.
• Can become corrosive enough for a single drop to eat a large hole through a floor 17.
• Shapes energy into small figures, spears, knives, and imitation blood-magic weapons for control practice 26.
• Compresses Blood Energy into sharper weapons; a condensed blood knife can cut his otherwise highly durable skin 26.
• Creates elastic bubbles beneath his feet to improve jumping, speed, and maneuverability 26.

Silver Armor

Yu Xian combines Blood of Silver with Blood Energy bubbles to create protective armor.

• Consists of fine silver threads woven over a layer of Blood Energy Bubbles 30.
• Includes a helmet, cloak, red Blood Energy lenses, and voice distortion to conceal his identity 30.
• The inner bubble layer cushions heavy impacts, while the outer silver layer can withstand and cut through attacks 30 31.
• While maintaining full armor, he can generally separate only four or five offensive silver threads at a time 30.

Spatial Bubbles

After consuming Pangu's Blood, Yu Xian's mutated Blood Energy develops a spatial attribute.

• Each Bubble is an independent space fixed to a spatial location 34.
• Their barriers withstand Snake Rank force and can nearly endure Eagle Rank power 34.
• Bubbles can be hard, elastic, adhesive, corrosive, vibrating, or altered into other properties 37 41.
• Highly adhesive Bubbles can restrain opponents below approximately Eagle Rank unless they possess sufficient power to destroy the Bubble 37.
• He can use Bubbles as projectiles, barriers, traps, platforms, and zero-gravity transport 36 37 39.
• Following the Spirit Pearl mutation, he can maintain up to five hundred two-meter Bubbles and regenerate the necessary energy much faster 48.
• Connected Bubble interiors allow him to move objects, limbs, allies, or himself from one Bubble to another, effectively granting short-range teleportation 48 49.

Pangu Bloodline

Pangu's Blood altered Yu Xian beyond normal vampire limits.

• Perfected his incomplete blood-memory talent, allowing him to receive information and memories contained in consumed blood 34.
• Created two hearts: the Vampire's Heart and Pangu's Heart 35.
• Yu Xian can decide which heart receives stored energy and which heart beats 35.
• The Vampire's Heart awakens a vampire ability every ten beats; Pangu's Heart awakens a Pangu Divine Ability every thirty-six beats 35.
• His first Pangu Divine Ability was Pangu's Spirit Pearl, which mutated into a major enhancement for his Bubble ability rather than producing a normal storage pearl 48.

Equipment / Weapons / Items

• Qilin identification and authorization documents — Grant him official authority and cooperation from Security Bureaus nationwide 13.
• Storage ring — Awarded alongside his First-Class Merit Medal; contains one hundred jin of silver 33.
• Silver reserves — Receives twenty pounds of silver from Nora and later gains a much larger official supply, supporting sustained use of Blood of Silver 21 33.
• Father's car — Used with Zhang Shou for independent night patrols around Silver City 22.

Relationships

• Nora Rex — The vampire whose blood gave Yu Xian his First Embrace. Initially sent to kill him as a test ordered by her father, she becomes his classmate, uneasy ally, combat partner, and frequent source of teasing 5 10 26.
• Zhang Shou — His longtime school friend and “meal buddy.” Yu Xian supports Zhang after he consumes a Forbidden Fruit, becomes Dead Doctor, and suffers the Seven-Day Life-and-Death Cycle 2 17 18 20.
• Jin Sheng / Lion Light — Captain of the Demon-Slaying Squad, recruiter, mentor, and sparring partner. Jin Sheng trusts Yu Xian's instincts and teaches him the gap between raw power and combat skill 13 15 16.
• Blue Bird — Demon-Slaying Squad teammate during the mountain operation. She supervises his Bubble training and fights alongside him against Zhou Tai's clones 36 37 40.
• Gong Qian — Qilin captain and powerful Pangu-blood user. Yu Xian helps save her from poison, then uses Bubbles to redirect her punches against Deimos 45 49.
• Chen Ling — Classmate and friend whose gossip first informs Yu Xian about Nora's Daywalker talent. She remains part of his school friend group after the Silver City incident 2 21 26.
• Zhou Tai — Recurring enemy who controls Aberrant Insects and later supernatural hosts. Yu Xian first battles him at school, later identifies his activities around the beast arena, and captures one of his numbered bodies during the mountain operation 10 31 41 42.

Story Role / Major Arcs

• Transformation and concealment — Becomes a wild vampire to survive ALS, discovers Light Eater, and returns to school as cover 1 2.
• Aberrant Insect Incident — Detects the infestation through Blood of Silver, chooses to report it, defends students, rescues survivors, and helps expose a plan that could have consumed all of Silver City 4 6 7 12.
• Qilin recruitment — Is recruited into the Demon-Slaying Squad under the codename Salty Fish because of his role in saving tens of millions of people 13.
• Silver City patrols and Superpower Academy — Studies at Superpower Academy while conducting patrols with Zhang Shou and improving his Blood of Silver and Blood Energy techniques 21 22 25 26.
• Beast Arena crisis — Confronts Zhou Tai inside a possessed transcendent white ape, protects spectators, and helps uncover the Brain-Hugging Neural Worm threat 30 31.
• Mountain operation and Deimos battle — Uses Bubbles to capture Zhou Tai's numbered bodies, protect allies, assist in defeating Deimos, and save members of the Evil-Slaying Squad 40 41 49 50.

Notable Quotes

“Although he was no longer human, he could not lose his humanity.” 6

“All right, we're comrades. There's no need for formalities.” 40

Trivia

• His Qilin codename, Salty Fish, comes from reading his name in reverse 15.
• Yu Xian was once obsessed with a vampire webnovel featuring Blood Energy and fictional blood magic; he later awakens the same rare talent himself 26.
• Nora calls him “Silver-Sucker” because she believes he eats silver rather than understanding the full nature of Blood of Silver 27.