Xiao

Biodata

Feature	Details
Name	Xiao (魈)
Alias(es)	Great Sage of Demon Subjugation; Golden Roc General; Protector/Vigilant Yaksha; Guardian Yaksha; Emperor Lord's Successor 345 775 776 856
Species/Race	Holy-Demonic Asura; formerly an Immortal Yaksha and Yaksha Clan member 114 860 862
Gender	Male
Affiliation	Demon Country Federation; Immortal Assembly; direct subordinate of the Geo Archon/Emperor Lord 345 776
Occupation/Role	Guardian Yaksha; first general under the Geo Archon; Floor Guardian of the Great Underground Labyrinth's 81st–90th Floors 471 768 776
Status	Active 1106

Power Progression

Stage / Realm / Level	Chapter	Notes
Pseudo Special A-rank	106	Rapidly rises to Pseudo Special A-rank; his eyes turn golden during the transformation.
Yaksha Clan	114	Evolves into the unique Yaksha Clan rather than becoming a Kijin like the others.
Demon Lord Seed	755	Reaches the realm through the Emperor Lord's Demon King's Blessing, then repeatedly refuses Awakening until he has fully consolidated his foundation.
Divine Realm (martial arts)	788 789	Breaks through while unconscious during the battle against the Imperial Army. The Emperor Lord's residual power restores and protects his spirit while he stabilizes the realm.
True Demon King / Holy-Demonic Asura	857 860 862	Awakens using one hundred thousand human souls, evolves from Immortal Yaksha to Holy-Demonic Asura, and obtains two Ultimate Skills. His Magic Essence rises to nearly five million. 861

Background / History

Xiao was critically injured during the Orc Lord incident and would have died in a cave without treatment. The Emperor Lord healed him, bestowed his true name and the Harp of Peace, and personally taught him Immortal Arts, martial arts, and combat principles. Xiao considers this kindness impossible to repay. 862 1058

Under the Emperor Lord's private training, Xiao's martial arts underwent a metamorphic improvement, and his karmic hindrance became manageable. He became Tempest's sixth-strongest individual at the time, surpassed only by Mo Li, Veldora, Azhdaha, Diablo, and Rimuru. 435

During the Jura Great Forest unification war, Xiao served as vanguard general. While the Emperor Lord and Azhdaha confronted foreign invaders, Xiao led part of the Rock Dragon Army and defeated or forced the surrender of most opposing tribal powerhouses, completing the campaign without their presence. 854

Appearance

Xiao is a refined, handsome youth of short stature, standing approximately 1.6 meters tall. His appearance becomes more striking after Awakening, while his presence shifts from that of a sharp battlefield general to an awe-inspiring figure bearing both divine and destructive killing intent. 784 861

• Golden or pale-golden eyes, which can turn blood-red when he releases killing intent or uses Asura Transformation. 106 797
• Usually wears elegant cyan robes. 775
• Wields the dark green spear Harp of Peace. 569 775
• Uses a terrifying mask in battle, including during his victory over Hinata Sakaguchi. 569
• Bears a golden-dark rune between his eyebrows after Awakening. 861
• His killing intent has manifested as a colossal blood-red dragon behind him. 775

Personality

Xiao is calm, taciturn, and intensely mission-focused. He is indifferent toward threats, status, and praise, but reacts strongly when his identity as the Emperor Lord's Protector Yaksha is dismissed or confused with another's. He values the name “Xiao” and his service under the Emperor Lord above world-given titles such as Great Sage of Demon Subjugation. 775

His defining trait is absolute loyalty to the Emperor Lord and the Demon Country Federation. Xiao's two central goals are to ease the Emperor Lord's burdens and to gain enough power to do so; he would willingly turn his spear against anyone, even gods, for that purpose. 745 1058

This loyalty fuels an obsessive pursuit of strength. Xiao repeatedly trains in secret, rejects premature Awakening, and seeks life-threatening battles to force breakthroughs. Though capable of calm judgment in combat, his self-reproach and tendency to overextend himself have nearly led him into demonic frenzy. The Emperor Lord grants him Forced Calmness to restrain these episodes. 755 781 789

Abilities & Skills

Divine Realm Martial Arts

Xiao is a Divine Realm martial artist whose strength relies heavily on techniques that cannot be accurately measured through realm or Magic Essence alone. The Emperor Lord's Uncrowned Martial Arts form the foundation of his combat style. 777 789

• Possesses combat experience exceeding that of most Tempest fighters, with only Mo Li, Azhdaha, and Diablo specifically noted as more experienced. 365
• His Spear Arts are unmatched in the Demon Country Federation except by the Emperor Lord. 777
• As a Demon Lord Seed, he defeated the Human Saint Hinata Sakaguchi. 569
• His Divine Realm martial arts allow him to defeat ordinary True Demon Kings even before his own True Demon King Awakening. 789 790
• Prolonged large-scale combat can exhaust him; the Imperial Army eventually wore down his stamina and left him severely wounded. 780 784

Harp of Peace

The Harp of Peace is Xiao's signature dark green spear and his primary weapon.

• Forged by the Emperor Lord into a weapon comparable to Mythical Grade. 435
• Used to repel Fabio, defeat Hinata, and slaughter tens of thousands of Imperial mecha-modified soldiers. 186 569 777
• Xiao relied only on the Harp of Peace and his martial arts while facing the Hundred Thousand Army, deliberately withholding powerful skills and trump cards to pursue a breakthrough. 777

Asura Transformation

A Unique Skill acquired upon entering the Divine Realm. It drastically enhances Xiao's physical capabilities, but risks consuming his reason. 793

• Raises all physical stats by 150% for five minutes. 793
• Can raise all stats by up to 300% for three minutes by sacrificing sanity. 793
• Xiao avoids fully unleashing it because doing so could turn him into a berserker. 796
• In its active state, his Magic Essence exceeds one million and his combat power rises beyond ordinary Awakened Demon Kings. 798

Asura Throw

A second Unique Skill gained with Asura Transformation. 793

• Can potentially bypass defensive measures and directly strike an opponent's main body if its luck-dependent effect activates. 793
• Used after Asura Transformation to kill nearly ten thousand Imperial soldiers in a single attack. 797 798

Ultimate Skills

Following his Awakening, Xiao possesses two Ultimate Skills and can enter his strongest state by activating both. 860 861 881

• Holy-Demonic King — obtained through his Demon Lord evolution. 860
• King of Slaughter — evolved from Heart of Slaughter through an unknown energy bestowed by the Emperor Lord. 860 862
• The two skills, Divine Realm techniques, and Harp of Peace together allow Xiao to contend with Calamity-class beings. 861 882

Sealing and Barrier Techniques

Xiao has extensively studied Immortal Arts focused on sealing and barriers, particularly as a countermeasure against beings who can revive after destruction. 963

• Prepares seals and barriers for immortal demons such as Diablo, Testarossa, Ultima, and Carrera, as well as Dragon Species such as Veldora. 963
• His objective is not merely to kill immortal opponents, but to suppress and seal them so they cannot return. 963

Killing Aura

Xiao can release a killing aura potent enough to overwhelm powerful opponents before physical combat begins.

• His pressure terrified an Imperial general and an army of one hundred thousand soldiers. 775
• He crushed Heavenly Emperor Emesia's Heroic Aura and forced her to expend nearly all her power to neutralize the retaliatory killing intent. 1057
• His aura and martial ability allowed him to suppress the Royal Guard Knights and temporarily contend with Velgrend. 880 882

Equipment / Weapons / Items

• Harp of Peace — Mythical Grade-comparable dark green spear forged for him by the Emperor Lord. 435
• Terrifying mask — battle mask worn during his fight with Hinata Sakaguchi. 569
• Resurrection Bracelet — an available safeguard that Xiao deliberately did not use during his battle against the Imperial Army. 775 781
• Crystal of One Hundred Thousand Human Souls — given to Xiao by the Emperor Lord and later used for his Awakening. 802 857

Relationships

• Mo Li / Emperor Lord — Xiao's savior, master, mentor, and the person to whom he is absolutely devoted. Mo Li healed and named Xiao, forged his weapon, trained him personally, protected him during the Divine Realm breakthrough, and helped grant him King of Slaughter. 435 789 860 1058
• Rimuru — Xiao serves the Demon Country Federation under Rimuru and repeatedly protects him, including shielding him from Velgrend and the Royal Guard Knights. 345 880 881
• Azhdaha — sparring partner and advisor who explains that very few beings in the Empire are capable of challenging Xiao. 745 777
• Veldora — sparring partner who recognizes Xiao as a monstrous Demon Lord Seed and later witnesses his Awakening. 745 856 857
• Diablo — recognizes Xiao as the Great Sage of Demon Subjugation and later senses that post-Divine Realm Xiao has become dangerous enough to threaten him. 345 794
• Testarossa — respects Xiao's strength and status as the Emperor Lord's favored Guardian Yaksha; she, Ultima, and Carrera repeatedly lose sparring matches against him. 963 1043
• Hinata Sakaguchi — defeated by Xiao on the Great Underground Labyrinth's 90th Floor while he was still a Demon Lord Seed. 569
• Velgrend — clashes with Xiao after he shields Rimuru; Xiao activates both Ultimate Skills to hold her off. 880 881
• Leon Cromwell — travels with Xiao, who acts as his protector during their visit to the Magic Dynasty; Leon is alarmed when Emesia probes Xiao. 1057 1058

Story Role / Major Arcs

Martial Arts Tournament

Xiao enters the Founding Festival martial arts tournament as one of the Demon Country Federation's strongest representatives. He defeats or suppresses formidable combatants, but withdraws before the final because the offenders against the Emperor Lord have already been punished and he values strength over the championship prize. 471 494 537

Great Underground Labyrinth

As the 90th Floor's guardian, Xiao defeats Hinata Sakaguchi while still a Demon Lord Seed. He later requests permission to face the entire hundred-thousand-strong Imperial mechanized army alone, intending to force a breakthrough by placing himself at the edge of death. 569 768 773

Xiao kills more than seventy thousand soldiers with only martial arts and the Harp of Peace, but is pushed to exhaustion and covered in wounds. While unconscious, he breaks through into the Divine Realm; the Emperor Lord temporarily pilots his body, routs the remaining army, and creates the incomplete martial art King of the World. 784 788

After stabilizing his Divine Realm, Xiao returns to the battlefield, activates Asura Transformation, and uses Asura Throw to end the remaining Imperial forces. 793 796 798

Awakening

After recovering, Xiao accepts the Demon Lord evolution using the souls of the one hundred thousand Imperial soldiers. He successfully awakens as a Holy-Demonic Asura and True Demon King, gaining Holy-Demonic King and King of Slaughter. 857 860 862

Imperial Capital Conflict

Xiao blocks Velgrend's attack, suppresses the Royal Guard Knights, and protects Rimuru from capture. He activates both Ultimate Skills and battles Velgrend in the sky, forcing Rudra and the Empire's strongest fighters to reassess his power. 880 881 882

Later Service

Xiao welcomes the Demon Lords to the Divine Temple as Guardian Yaksha, remains vigilant against potential threats within the Demon Country Federation, and accompanies Leon to the Magic Dynasty. His killing aura terrifies Heavenly Emperor Emesia when she attempts to probe him. 925 963 1057

Notable Quotes

“If there's danger, just call my name!”
— Xiao's response to others while serving as a Guardian Yaksha. 471

“I am not ‘Lord Rimuru’. I am Xiao, a ‘Protector Yaksha’ under the ‘Geo Archon’.” 775