Lu Jiu

Biodata

Background

Lu Jiu served as Si Jinyan's personal doctor before Chi Li entered the Marshal's household. He initially opposed moving Chi Li into the residence, recommending that Si Jinyan instead return to the institute whenever his susceptible period approached. Si Jinyan rejected the proposal. 2

He has spent years researching ancient records concerning merfolk biology and the missing Merfolk Core scale near Si Jinyan's heart. His findings establish that the Core scale protects a merfolk's heart and is associated with extraordinary restorative and defensive properties. 13

After Chi Li's arrival, Lu Jiu monitors the unprecedented effects of their compatibility: Si Jinyan's condition stabilizes markedly, but the Marshal develops an escalating physical dependence on Chi Li. 25 50

Appearance

Lu Jiu appears to be in his twenties and has the approachable bearing of a recent college graduate, though his demeanor changes sharply when examining patients or confronting medical danger. 13

• Wears glasses. 13
• Usually smiles warmly, but scrutinizes others with a sharp gaze. 13
• Has a low, mellow voice. 20

Personality

Lu Jiu is observant, direct, and professionally uncompromising. He openly scolds Si Jinyan for endangering himself, refuses to minimize the risks of the Marshal's merfolk condition, and repeatedly warns him that Chi Li could become a fatal vulnerability. 13 25

Though unable to force Si Jinyan into treatment, he is among the few people willing to intervene when the Marshal loses control. His concern extends to Chi Li, whose injuries and exposure to Si Jinyan's unstable pheromones he treats as urgent medical dangers. 18 22

Outside medicine, Lu Jiu is teasing and persistent, particularly toward Qiu Rui. He uses flowers and playful remarks to provoke reactions, then privately studies Qiu Rui's habits with clinical precision. 25

Abilities & Skills

Medical Expertise

Lu Jiu is a leading physician with specialized knowledge of pheromone disorders, secondary-gender physiology, and merfolk biology.

• Diagnosed the connection between Si Jinyan's Pheromone Deficiency Syndrome and the destabilization of his merfolk blood. 13
• Recognized the silver-black scales growing over Si Jinyan's healed bullet wound and administered treatment to conceal them. 13
• Identified the absence of Si Jinyan's protective Merfolk Core scale through years of research and clinical observation. 13
• Detected foreign sex-targeted genes in Si Jinyan's body, revealing that he had permanently marked Chi Li. 25
• Confirmed that Si Jinyan's permanent mark on Chi Li was fading and ruled out ordinary gland defects as an explanation. 26
• Explained that an Enigma can theoretically mark an alpha, but such marking would likely require prolonged exposure and cause pain and psychological resistance. 27

Pheromone Research

Lu Jiu studies methods of stabilizing Si Jinyan's volatile pheromones.

• Initially supported the use of compatible omegas to regulate Si Jinyan's susceptible periods. 2 13
• Determined that Chi Li's presence greatly improved Si Jinyan's condition while also creating dangerous dependency. 25
• Helped develop a substitute inhibitor that can temporarily stabilize Si Jinyan, though it cannot replace Chi Li's unique effect. 50
• Warned that extended contact between Si Jinyan and Chi Li may trap them in a worsening cycle of stabilization and instability. 50

Crisis Intervention

Lu Jiu acts as a medical safeguard when Si Jinyan's self-control deteriorates.

• Pulled Si Jinyan back from the brink of attacking Yao Di by calling his name and physically intervening. 18
• Warned Si Jinyan not to engage intimately with the injured Chi Li while his pheromones and merfolk traits were dangerously unstable. 22
• Monitored Si Jinyan through Qiu Rui when the Marshal refused direct examinations or stopped reporting his condition. 24

Relationships

• Si Jinyan — Personal doctor and long-standing confidant; Lu Jiu treats his pheromone disorder and merfolk instability, while repeatedly challenging his reckless and possessive decisions. 2 13 18 25
• Chi Li — Patient and the source of Si Jinyan's unusual stabilization; Lu Jiu examines Chi Li's sensitivity periods, injuries, marks, and abnormal physiology. 15 22 26 27
• Qiu Rui — Frequent contact and apparent romantic interest; Lu Jiu brings him pink roses, teases him, and carefully observes his embarrassed reactions. 24 25
• Geng Ji — Shares concern over Si Jinyan's deterioration and the danger of keeping Chi Li nearby. 50
• Yao Di — Opposes the Emperor's proposal to forcibly extract and preserve Chi Li's pheromones, though he is unable to openly defy him. 17

Trivia

• Lu Jiu calculated that Qiu Rui took 0.09 seconds longer than usual to throw away a bouquet of pink roses. 25
• Despite being an alpha, Si Jinyan's pheromone pressure can immobilize Lu Jiu due to the Marshal's nature as an Enigma. 18