Cai Yuelin

Biodata

Feature	Information
Name	Cai Yuelin (蔡跃鳞)
Gender	Male
Affiliation	Four Swords Sect; Celestial Pivot Sword Hall 19 30
Occupation/Role	Celestial Pivot Sword Hall disciple; one of the Four Swords Sect's younger generation of swordsmen 19 32
Status	Alive 42
First Appearance	Chapter 10: Karmic Entanglement from a Past Life

Power Progression

Stage / Realm / Level	Chapter	Notes
Ninth rank, Qi Refinement	17	Improved dramatically after cultivating in the moonlight around Liu Yunshen's practice site; he stated that advancement to the Second Realm was close.
Eighth tier, First Realm of Qi Refinement	31	Advanced through resonance with the Four Swords Harmonious Light Formation.
Ninth tier, First Realm of Qi Refinement	31	Continued absorbing astral qi from the formation and immediately rose another tier.

Background / History

Cai Yuelin travelled with Gong Liefeng, Cao Langao, and Lei Zhaoye while escorting a merchant caravan into the Han capital. He quickly became close to Liu Yunshen, treating him as a sworn brother despite knowing him only a short time. 10

He is a disciple of Celestial Pivot Sword Hall, one of the four sword lineages that make up the Four Swords Sect. His father, Cai Tingyue, leads the Celestial Pivot Sword Hall. 19 30 32

Personality

Cai Yuelin is playful, irreverent, and prone to jokes at his companions' expense. He can imitate Cao Langao's voice convincingly, uses teasing to diffuse tension, and is repeatedly described as having a loose mouth. 10 11 28

Despite this frivolous exterior, he is loyal in danger. He stood with Liu Yunshen against an overwhelmingly stronger Li Clan servant, fought to rescue Cao Langao, and grieved fiercely when Gong Liefeng was killed. 10 13 20

Abilities & Skills

Vocal Mimicry

Cai Yuelin can closely replicate other voices, including Cao Langao's.

• His imitation is convincing enough to fool listeners who do not pay close attention. 10
• He primarily uses the skill for pranks and teasing his companions. 10

Lightning Swordsmanship

Cai Yuelin's sword style is characterized by exceptional speed and lightning-like Sword Qi.

• Can merge man and sword into a blazing streak of lightning. 13
• Killed three demonic sect enemies in quick succession during the elm-forest battle. 13
• His lightning-fast sword strikes briefly numbed Yan Chen and weakened the latter's body. 21
• Used rapid movement and a flanking thrust to pressure Qin Xiong. 20

Four Swords Sect Formations

As a Four Swords Sect disciple, Cai Yuelin contributes his Sword Qi to the sect's combined formations.

• Joined Gong Liefeng and Cao Langao in battle formation against demonic sect pursuers. 13
• Participated in the four-sword formation used against Yan Chen and Qin Xiong. 22
• Benefited directly from the Four Swords Harmonious Light Formation, which pushed him to the ninth tier of the First Realm. 31

Relationships

• Liu Yunshen — Close brother-in-arms. Cai Yuelin defended him against the Li Clan servant, joined his missions, and supported him after his emotional distress over the Li Clan young miss. 10 11 21
• Gong Liefeng — Fellow disciple and frequent partner in pranks and combat. Cai Yuelin was devastated by Gong Liefeng's death and fought Yan Chen in anger. 10 20 28
• Cao Langao — Fellow Four Swords Sect disciple whom he teases by mimicking her voice; they also fight alongside one another. 10 13 28
• Lei Zhaoye — Fellow swordsman and companion. Lei Zhaoye regularly restrains Cai Yuelin's more insensitive jokes, while the two cooperate in battle. 11 20 22
• Cai Tingyue — Father and master of Celestial Pivot Sword Hall. Cai Yuelin accompanies Liu Yunshen to play Go with him and is sent away by his father when the sect masters need to speak privately with Liu. 30 32
• Hu Lieshan — Cai Yuelin helps introduce him to Celestial Pivot Sword Hall's saber instruction and the Purple Lightning Quick Blade. 30
• Qi Hong — Cai Yuelin asked to become his disciple, but Qi Hong judged him too restless and advised him to focus on sword practice instead. 39

Story Role / Major Arcs

Journey to the Han Capital

Cai Yuelin accompanies Liu Yunshen's party into the Han capital, where their brotherhood develops. He joins Lei Zhaoye in testing Liu Yunshen's strength, then stands before the powerful Li Clan servant alongside Gong Liefeng. 10

Rescue of Cao Langao

When Cao Langao is abducted, Cai Yuelin helps plan and carry out her rescue. He protects her during the ambush at the elm forest and joins the escape from the demonic sect. 11 13

War with the Demonic Sect

Cai Yuelin fights throughout the conflict with Cao Huan's group. After Gong Liefeng's death, he attacks Yan Chen with grief and fury, suffering an injury when Yan Chen's Formless Human Bone technique tears at his flesh. 20

He later joins Lei Zhaoye in a combined aerial sword strike against Yan Chen and takes part in the Four Swords Sect's formation assault. 22

Four Swords Sect Rebuilding

After the group relocates toward Qin territory, Cai Yuelin explains the Four Swords Sect's plan to establish a new headquarters there. 19

At Celestial Pivot Sword Hall, he assists Hu Lieshan's search for a suitable martial art and witnesses the sect-wide breakthrough triggered by the Four Swords Harmonious Light Formation. He personally reaches the ninth tier of the First Realm during this event. 30 31

Defense of Zhao Family Village

Cai Yuelin joins Liu Yunshen and the others in defending Zhao Family Village against Zhu Xun and later against Chang Yi. He openly curses the enemy during the battle and remains among the sect members protected by Qi Hong's intervention. 37 38 42

Trivia

• Cai Yuelin considers the name “Celestial Pivot Sword Hall” less impressive than “Purple Lightning Sword Court.” 30
• He is shorter than Liu Yunshen when Liu is disguised as Cao Langao. 12
• He is particularly vulnerable to tickling and laughs until he can barely breathe when Gong Liefeng and Cao Langao retaliate against his teasing. 28