Ye Lanlan

Ye Lanlan is the cousin of Ye Yan, and a Nightwatcher from the Southern main branch Nightwatcher family. A Nightwatcher with the ability to control seven Demon Flags, she possessed talent and effort on par with her cousin.

Due to her actions, she was the primary antagonist of the Ye Lanlan Arc before becoming a supporting character upon the relevation at the end of the story arc.

Background
Ye Lanlan was born in the Southern main branch family of the Nightwatchers. When she was 4 years old, she asked her older cousin Ye Yan if he would marry her when they grew up, who promised to do so. Considered a weakling since she was young, Ye Lanlan trained extremely hard and eventually was able to control up to seven Demon Flags at the Demon Flag Awakening Ceremony. However, Ye Yan controlled up to eight and was nominated by the Northern and Southern main branch families as the new guardian to join the Department of Night in Xiahou High School. Resolving to outshine her cousin, Ye Lanlan physically trained herself even more and learnt the art of hypnotism, which she combined with Chi Shock to create Instant Chi Shock. At some point in her life, she formed a summoning pact with Lady Seashell to counter Ye Yan's Hundun, as well as captured twenty one extremely strong Cyclopes. However, her feats were still constantly outshone by her cousin's, Three from Sun seized her lack of self esteem and offered her the chance to join Sun and kill Ye Yan, but she declined and beated him up for attempting to instigate her relationship with Ye Yan. About a month before her appearance, she was diagnosed with cancer and the doctor claimed she will start growing weaker after a month. Wishing to see the difference between her and Ye Yan, as well as examine his strength before she starts weakening, she reluctantly joined Sun and was able to join the Department of Night.

Personality
Ye Lanlan initially seems manipulative and cunning, as she repeatedly worsened Ye Yan's relationship with other members in the Department of Night through the use of hypnosis, misunderstandings and bribery, attempting to replace his position as the Nightwatcher guardian. This was all revealed to be an act, in reality she cared deeply for her older cousin, as she infiltrated Sun as an undercover not only to have the chance to duel with him, but also to investigate the organization and eventually provide intel to him after their duel.

Ye Lanlan lacks self-esteem after being constantly outshone by her older cousin Ye Yan for most of her life, which causes her to overestimate him, especially during combat where she would find every strategy to counter Ye Yan's strategies. Ye Yan points this out after their duel, and believes that if she was a bit more confident in herself, she would have won the duel.

Due to training her entire life and being secluded from society, Ye Lanlan lacks common knowledge, as shown when she believed cancer to be absolutely incurable after watching Korean dramas, when in reality her cancer could be cured if she informed her family earlier. Watching drama shows also made her dramatic, as shown when she revealed her plans for her "dramatic death" after fighting Ye Yan.

She also likes to tease Ye Yan and Huang Xiaoyan about their relationship, constantly hinting that the two of them are a couple, which flusters both of them a lot.

Appearance
Ye Lanlan has turquoise eyes and and a mature physique. She had long white hair with a single braid of hair on the left of her head, though her hair is presumably gone after going through radiation therapy to treat her cancer. She wore a white dress, white stockings and her red Demon Flag Scarf for most her appearances. She temporarily wore the Xiahou student uniform while she was attending the high school as a student.

Abilities and Powers
Ye Lanlan was the most talented Nightwatcher from the Southern main branch Nightwatcher family, as she controlled seven Demon Flags, a feat that is almost impossible to achieve. She is physically strong, as she was able to easily throw a large man over her shoulder. She also learnt hypnosis, which she combined with Chi Shock to create Instant Chi Shock, a technique no Nightwatcher has ever achieved throughout history.

Equipment

 * Soul Gong (镇魂锣 Zhèn Hún Luó, lit. "Soul-Reposing Gong"): A main branch Nightwatcher exclusive weapon. If struck by the Soul Mallet, it can produce a sound that either renders anyone within close proximity to the gong unconscious or temporarily immobilizes anyone who heard the sound other than Nightwatchers, who have certain levels of immunity to losing consciousness and paralysis. However, if repeatedly struck within a short timeframe, the immunity will start to weaken and eventually the Nightwatcher themselves will be affected by the sound, showing signs such as extreme fatigue and nose bleeding. Even if they are shattered, Soul Gongs can still produce the immobilizing sound if the pieces are taped back together and can be welded back together through unknown methods. The immobilizing effect only works on the receivers' bodies, therefore it can not stop someone from mentally controlling or summoning a weapon.
 * Soul Mallet (镇魂锤 Zhèn Hún Chuí, lit. "Soul-Reposing Hammer"): A main branch Nightwatcher exclusive weapon, it can be used to strike the Soul Gong to create an immobilizing sound or physical attacks. When a Nightwatcher assumes the Night Conqueror form, the Soul Mallet's power increases drastically, becoming capable of producing large explosions upon impact when thrown and destroying a monster's soul along with its body in one direct hit.
 * Demon Flag (煌妖幡 Huáng Yāo Fān, lit. "Brilliant Demon Banner"): A Nightwatcher exclusive equipment. It is used to capture monster by atomizing their bodies into green fog along with their soul and enslave them as Flag Demons for eternity, courtesy of the numerous formulae programmed into them. Flag Demons are capable of making themselves invisible and intangible by turning themselves into green smoke, or solidify themselves to physically attack. Nightwatchers are also able to telepathically communicate with their Flag Demons within a few hundred meters. Nightwatchers are also capable of telekinetically moving Demon Flags within a few dozen meters of themselves, which allows them to hide their flags around the battlefield for sneak attacks with their Flag Demons. Main branch Nightwatchers possess purer bloodlines and are thus usually able to control multiple Demon Flags. According to Wang Shengli, a Nightwatcher that can control more than four flags is able to store three Flag Demons at most in one flag. Ye Lanlan weaved her seven Demon Flags into a scarf and dyed it red, disguising it as a normal scarf. Her Flag Demons consist of twenty one Cyclopes.

Nightwatcher exclusive techniques

 * Spirit Shock (元气震 Yuán Qì Zhèn, lit. "Spirit Tremor"): After accumulating enough negative emotions from experiencing grievances, a Nightwatcher can release the stored energy into their vicinity, indiscriminately knocking creatures around them unconscious before falling unconscious themselves shortly afterwards, though they will usually wake up before the others due to a temporary boost in resistance. While using this technique and before fainting, the Nightwatcher's eyes will glow. The time a person is rendered unconscious depends on the degree of their strength in comparison to the user's and their stamina: people established to be powerful and strong-willed fall unconscious for considerably less time than the weak-willed, but may faint for longer if they were exhausted beforehand. This technique cannot affect organisms that were unconscious before it was used, on organisms that were alertly focused on the user, or Flag Demons that are inside Demon Flags.
 * Timed Knockout (定时锤 Dìng Shí Chuí, lit. "Timing Hammer"): By controlling their strength and striking a person's head with a blunt object, a Nightwatcher can knock them unconscious for a certain duration. The time of unconsciousness induced in one hit can range from five seconds to an hour, but consecutive hits can extend the duration. This technique cannot affect organisms who are alertly focused on the user and can be undone if the unconscious creature takes any damage other than a Timed Knockout attack.
 * Time Guessing Pinch (掐心算点 Qiā Xīn Suàn Diǎn, lit. "Heart Pinch Calculate Time"): By pinching their fingers, a Nightwatcher can accurately calculate the time of day down to seconds, even if the environment around them has not changed. The time is usually denoted with the traditional Chinese time standard.
 * Penta-Shockwave (五方烈震 Wǔ Fāng Liè Zhèn, lit. "Five Corner Violent Quake"): By slamming the Soul Mallet onto the ground, a Nightwatcher can create a shockwave strong enough to send debris flying everywhere. This move is used to create an opening for attacks or kick up debris to obscure one's position.

Ye Lanlan's techniques

 * Hypnosis (催眠): Ye Lanlan is able to hypnotise someone by merely touching their necks gently, which lowers their alertness, allowing her to subsequently knock them out with Chi Shock. By hypnotising herself, she can freely control her emotions such as rage and despair, which allowed her to develop Instant Chi Shock. Combined with making eye contact with the receiver, Ye Lanlan can perform Compound Hypnosis.
 * Compound Hypnosis (复合催眠术): By making eye contact with the receiver and hypnotising them by touching their neck, Ye Lanlan can perform Compound Hypnosis, which temporarily robs the receiver of their senses and control over their body. This was used twice on Ye Yan under the disguise of a hug.
 * Instant Chi Shock (瞬发元气震): By controlling her emotions through the use of hypnotism, Ye Lanlan can bypass the necessary emotional requirement for Chi Shock, allowing her to use Chi Shock whenever she wants. However, this technique doesn't bypass the limitations or consequences.
 * Lady Seashell Summon: Ye Lanlan can summon Lady Seashell to aid her in battle. She mainly used her to counter Ye Yan's Hundun, who is weak to water.
 * Bedrock Step (磐石步): Ye Lanlan stomps her foot onto the ground, which stabilises her lower body and balances herself if she is thrown off balance.