Nick

Biodata

Feature	Information
Name	Nick Castle (尼克)
Alias(es)	Boss Nick; “Rogue” Nick
Species/Race	Human
Gender	Male
Affiliation	Hell Demon Gang; Runners Company; War Axe School; Timberwolves
Occupation/Role	Hell Demon Gang leader; student; recruiter and negotiator for the Timberwolves; Runners Company promoter
Status	Active
First Appearance	84

Power Progression

Stage / Realm / Level	Chapter	Notes
Mechanical prosthetic user	106 393	Already uses a prosthetic leg; rapid growth later leaves it ill-fitting.
Rider of Wild	393	Becomes Wild’s rider and takes responsibility for the young Triceratops.
Nano-prosthetic integration	881 882	Stark replaces his right mechanical leg with a silver nano-prosthetic that adjusts itself to match his left leg.
Knight Training Method	1652	Begins training to form a deeper connection with Wild; shows greater aptitude than Richard.
Tactical nano-armor user	1733 2045	His prosthetic can form shields, a nano-whip, and a full combat suit; most of its functions are eventually unlocked.
Nano-armored dragon knight	2257	Uses his prosthetic to armor both himself and Wild in a dwarven-knight configuration.
Archangel-enhanced commander	2305 2306	Merges with an Archangel Michael projection, wears Yazi armor, wields a greatsword and Reality Ring, and deploys level-twenty Thorns and Fanaticism auras.

Background

Nick is Frank Castle’s biological son and Alvin’s godson. As a child, he quietly watches over Frank, whose life of war leaves him unsure how to respond to his son’s concern 84. Alvin becomes a central guardian and mentor in Nick’s life, eventually regarding him as a son rather than merely family by association 878.

Nick’s childhood is marked by loss, disability, physical pain, and ridicule. Alvin deliberately refuses to treat him as fragile, instead pushing him toward resilience, family attachment, and a fearless—if often crooked—personal code 1983. His original prosthetic becomes too small as he grows, a problem he hides until Stark discovers it 393.

Stark replaces Nick’s mechanical right leg with a nano-prosthetic. Nick is visibly terrified of the surgery and hospital setting, but Alvin stays with him until he is sedated 881. The replacement limb includes an age-based safety lock, intended to keep its more dangerous functions inaccessible until adulthood 879.

Appearance

By age twenty-two, Nick stands 190 cm tall and has become powerfully built through years of training. His normally teasing smile can give way to a notably solemn expression when family or responsibility is involved 2303.

• Silver nano-prosthetic right leg, designed to become visually identical to his natural leg 882.
• Frequently adopts exaggerated “boss” poses, including slicked-back hair and theatrical entrances 2150.
• Can deploy his prosthetic’s nanomaterials as armor over himself and, at times, over Wild 2156 2257.

Personality

Nick is bold, talkative, mischievous, and unusually comfortable provoking people larger or more dangerous than himself. He teases friends, bluffs confidently, and repeatedly casts himself as a feared underworld boss—even when adults immediately undermine the image he is trying to build 2274.

His bravado masks genuine vulnerability. He becomes anxious before surgery, dislikes hospital beds, and carries the emotional effects of a painful childhood 881 1983. Even so, he remains calm in situations that unsettle other children, including confinement and supernatural attacks 1339 1733.

Nick’s worldview reflects Hell’s Kitchen’s pragmatism. He wants to help people who lack opportunities, particularly errand runners, but often reaches his goals through manipulation, intimidation, or schemes that blur the line between generosity and extortion 1461 2150. He has a basic moral boundary—he insists the Hell Demon Gang should not harm innocent people—but he is also fascinated by appearing dangerous and earning others’ fear 2150 2158.

Abilities & Skills

Nano-Prosthetic Manipulation

Nick’s prosthetic leg is built from nanomaterials and becomes the basis of his combat equipment.

• Forms a full-body nano-armor suit when he enters combat 2156.
• Can transform into a shield capable of blocking a merman’s harpoon strike 1733.
• Can produce a nano-whip to restrain opponents 1733.
• Links directly with mounted weapons, including a Predator shoulder cannon 2172.
• Contains age-gated functions; most functions are later unlocked 879 2045.

Dragon Riding

Nick rides Wild, a Triceratops he treats as both mount and partner.

• Begins with Wild as a young rider and caretaker 393.
• Trains through Professor Zhang’s Knight Training Method to strengthen their connection 1652.
• Uses nano-armor to equip both himself and Wild as a mounted knight 2257.
• Leads cavalry charges while riding Wild during large-scale battles 2258 2305.

Combat and Tactical Leadership

Nick is not physically imposing in his early years, but he compensates with equipment, audacity, and a growing ability to organize others.

• Uses firearms effectively against Sirens and merfolk, including a Remington shotgun 1733.
• Provides battlefield support with a shoulder cannon rather than forcing himself into a front-line role 2046.
• Coordinates a mixed team of armored, invisible, melee, ranged, and support fighters into a coherent unit 2046.
• Rallies Vityaz soldiers during a collapsing battle line and turns their retreat into a last stand 2258.

Reality Ring and Paladin Auras

During the Underworld campaign, Nick gains access to far more powerful supernatural equipment.

• Uses the Reality Ring to manifest armies of oni-demons from imagination 2305 2306.
• Activates a level-twenty Thorns Aura that inflicts tenfold reflected damage on attacking undead 2306.
• Deploys level-twenty Thorns and Fanaticism over allied abominations during a charge 2305.
• Channels Archangel Michael’s power through Yazi armor and a greatsword 2305.

Negotiation and Recruitment

Nick has a talent for turning personal connections into opportunities for others—and for himself.

• Acts as a liaison between Timberwolves players and college coaches, preparing player measurements and scholarship pitches 1888.
• Secures a UCLA opportunity for “Cream” and attempts to recruit “Butter” for Notre Dame 1889.
• Negotiates directly with Coach Sutton over scholarship placements and player recruitment 1892.
• Builds the Hell Demon Gang and Runners Company around employing marginalized runners rather than simply claiming territory through violence 2150 2152.

Equipment

• Nano-prosthetic right leg — Adaptive limb with armor, shield, whip, and weapon-link functions 1733 2156.
• Wild — Nick’s Triceratops mount and dragon-riding partner 393 1652.
• Predator shoulder cannon — Shoulder-mounted energy weapon linked to his nano-armor 2172.
• Remington shotgun — Used against Sirens and merfolk 1733.
• Reality Ring — Creates manifested forces from Nick’s imagination 2305 2306.
• Yazi armor and greatsword — Archangel-enhanced battlefield equipment 2305.

Relationships

• Frank Castle — Biological father. Their relationship begins with Frank struggling to express affection, but Frank ultimately supports Nick’s ambitions and protects his future 84 2152.
• Alvin Ye — Godfather, guardian, and mentor. Alvin guides Nick through disability, discipline, and moral boundaries while treating him as family 878 1983.
• Ginny — Close sibling-like companion and frequent co-conspirator. She supports Nick’s ambitions and fights beside him despite their constant teasing 2152 2172.
• Mindy Macready — Rival, friend, and frequent target of Nick’s poor jokes. She repeatedly beats him up, but also fights beside him and accepts his protection 1178 2258.
• Richard — Nick’s closest friend and trusted “brother.” They support one another in school, business, and combat despite Nick’s endless mockery 1197 1733.
• Little Harry — Business partner and technical ally. Nick relies on Harry’s mathematical model and technological work for the Runners Company 2150 2152.
• Nate — Mentor, legal protector, and eventual manager of Nick’s company 2152 2157.
• Wild — Mount and combat partner. Nick’s progress as a knight is tied directly to their bond 1652 2257.
• Neil Frank Ye — Treated as a younger brother after Neil’s arrival from the future; Nick offers him protection and guidance 2194 2303.

Story Role / Major Arcs

Community School and Fundraising

Nick helps organize the school’s Christmas wish-list effort, discovering that interpreting children’s requests and playing Santa is more difficult than expected 648 652. He later engineers a successful church fundraiser after Sharina and Gwen mishandle their own event, secretly exchanging donated money beforehand to ensure the project succeeds 1461 1463.

Timberwolves Recruitment

Nick becomes a key intermediary during Timberwolves football recruitment. He presents player statistics to scouts, brokers scholarship opportunities, and attempts to protect teammates’ prospects from being exploited by college programs 1888 1889 1892.

Hell Demon Gang and Runners Company

Nick proposes an errand-runners alliance intended to challenge Las Vegas gambling interests while creating work for marginalized runners. He expands the plan into the Hell Demon Gang and a company supported by Alvin, Frank, Stark, Nate, Richard, Ginny, and Harry 2150 2152.

His first major operation targets the Gray Wolf Gang and Barracuda’s organization. Although he wants dramatic negotiations and a fearsome reputation, the operation is largely controlled by more experienced allies and cleaned up by the FBI 2155 2156 2157.

Underworld and Vityaz Battles

Nick leads Vityaz troops against Treants and Alvin’s uncontrolled war creatures, rallying soldiers when panic threatens to break their formation 2258. During the later Underworld war, he commands mounted charges on Wild, summons demonic forces through the Reality Ring, and employs powerful Paladin auras against the undead 2305 2306.

Notable Quotes

“Other than those bastard gangs, I don't plan to hurt anyone! I'm helping some people. Do I need anyone's permission to do that?”
— Nick 2150

“My name is Nick. Nick Castle. I'm your children's savior, and their future boss.”
— Nick 2274

Trivia

• The author identifies Nick as Frank Castle’s son from The Punisher films but describes this version as “basically a new character” 659.
• Nick’s supposed telepathy game with Alita is actually assisted by Ginny covertly signaling him from behind her 869.
• Neil’s future knowledge predicts that Nick will become the boss of the Ravagers, provided he befriends Barney 2194.