Master Chief

— John-117

## Summary

Master Chief Petty Officer **John-117**, more commonly known as the **Master Chief**, is a SPARTAN-II commando of the UNSC Naval Special Warfare Command. He is the protagonist and main character in both the *Halo Trilogy* and Reclaimer Saga with over thirty years of active duty, he has become one of the most decorated war veterans in the United Nations Space Command, earning every known UNSC medal except the Prisoner of War Medallion.

## Power and Stats

**Tier**: At least **Wall Class** | At least **Small Building+ Class**, likely **higher** | **Street Class** to **Building+ Class** with weapons | **Street Class** to **Multi-City Block Class** with weapons, higher with damage powerups and REQ variants.

**Name**: John (But his surname is unknown, except to Dr. Catherine Halsey and a handful of other people related to the Spartan II Program), "John-117" (A combination of his name and his Spartan Tag), Master Chief (Short version from his title given by the UNSC), Chief/The Chief (Nickname used by various characters), SPARTAN-117 (UNSC Military Designation), Sierra 117 (Phonetic call sign of Military Designation), Referred as "Reclaimer" by Forerunners & Forerunner AI, Nicknamed "Demon" by the Covenant Empire and other Covenant Remnants.

**Origin**: Halo

**Gender**: Male

**Age**: Approximately 47 years old in Earth years by 2558 (physical aging was slowed during cryosleep)

**Classification**: Human, Super-soldier, SPARTAN-II Programme Candidate, Master Chief Petty Officer of the UNSC Navy.

**Powers and Abilities**: **Superhuman Physical Characteristics**, **Cybernetic physical and mental augmentations**, **Weapon Mastery** (Military technology mastery with UNSC and Standard Covenant Weapons, High-Tech weapons mastery with Forerunner Technology and Heavy Covenant Weapons), **Stealth Mastery**, **Martial Arts Expert**, **Pain Tolerance** | All previous plus **Adaptability** with MJOLNIR Spartan Armor, **Enhanced Senses** (Such as Enhanced Awareness, Hearing, Night and Telescopic vision with MJOLNIR Helmet), **Healing** (With Spartan Shields, Biofoam, Regenerator and Regeneration Field), **Forcefield Creation** with Bubble Shield, **Invisibility** with Cloaking (Invisibility) and Active Camouflage, **Statistics Amplification** with various Boosts and Equipment, **Homing Attack** with Hydra Launcher and other weapons, **Plasma Projection** and **Energy Projection** with various Covenant weapons, **Limited Gravity Manipulation** with Type-2 Gravity Hammer and Beam Rifle Delta (Gravity hammer pulls targets closer and Beam Rifle Delta creates small portals upon impact), **Limited Illusion Creation** with Hologram (Capable of creating a Hologram of himself, but it only walks forwards and cannot be controlled) **Resistance** to **Temperature** and **Radiation** | All previous plus **Attack Reflection** and **Forcefield Creation** with Hardlight Shield, **limited Flight** with Thruster Pack, **Can see invisible beings** and **X-Ray/Thermographic Vision** with Promethean Vision, **Resistance** to **Virtualization** with Genesong, (Resisted the Composer, a Forerunner technology that transforms biological lifeforms into computer AI's)

**Attack Potency** At least **Wall Class** (Accidently killed two ODST soldiers, and casually kicked a man wearing an exoskeleton compareable in mass to Mjolnir armor 8 meters away, can spar with other Spartans and survive, and is considerably stronger now as an adult) | **Small Building+ Class**, likely **higher** (Can KO other Spartans and other comparable troops with multiple punches, overpowered an Elite Zealot while extremely exhausted, is capable of killing weaker Sangheili with one punch), **Street Class** to **Building+ Class** with weapons (Arsenal ranges from Handguns to Spartan Lasers) | **Building Class** (His new suit is significantly more powerful than before, is comparable to Spartan Edward Buck who casually killed a Promethean Soldier with a stomp, managed to penetrate the Didact's eye with a knife, but got stomped shortly afterwards), **Street Class** to **Multi-City Block Class** with weapons (UNSC weapons are slightly stronger than before, can get access to various Promethean Weapons), **higher** with damage powerups and REQ variants.

**Speed**: **Superhuman** travel speed (Ran half a kilometer in 17 seconds; nearly 106 kilometers per hour, but tore his Achilles tendon doing it) **Subsonic** combat speed (Can react to stun rounds) | **Superhuman** movement speed (Should be faster than before) **higher** with speed amps, **Supersonic** combat speed/reactions (Can react to bullets and Covenant plasma projectiles, has barely dodged handgun fire at point-blank range, viewed combat with the ODST's in slow motion) **higher** when paired with Cortana (With her help, he reacted to a projectile he'd be unable to normally), **Speed of Light** attack speed with Spartan laser (requires 5 seconds to charge) | **Superhuman** movement speed (Should be faster than before) **higher** with speed amps, **Supersonic** combat speed and reactions (Faster than before and has reacted to Promethean Lancer Knights)

**Lifting Strength**: **Class 1** (Can lift at least 3 times his own body weight, lifted 500 kilograms as a test | **Class 10** with MJOLNIR armor (Comparable to Cal-141 who deadlifted 5 tonnes, dragged a large antimatter warhead around with little effort, casually flips overturned 3 ton Warthog jeeps single-handedly, one Spartan moved a large stone monolith while also fighting back the pain of losing half of his left arm, is somewhat stronger than the average Elite and somewhat weaker than the average Brute) | At least **Class 10** (Should be stronger than before)

**Striking Strength**: At least **Wall Class** (A 14-year old John accidentally pummeled several ODSTs to death without even realizing it and launched one of them 30 feet with a few punches) | **Small Building Class+**, likely **higher** (Can kill weaker Sangheli with a single punch, who are somewhat comparable to his Mark 5 form, and outwrestled a physically superior Brute) | **Building Class** (Stronger than before, comparable to Buck, who one-shotted a Promethean Soldier with a curbstomp.

**Durability**: At least **Wall Class** (John, at the age of 14, had the confidence to survive a 30 meter fall with little to no injury | **Small Building+ Class**, likely **higher** (Can withstand various sorts of human and covenant weapons, can take hits from other Spartans, survived blows from speeding Warthogs and a 2 kilometer fall, survived being somewhat close to Scorpion Missle detonation), **Building Class** with MJOLNIR energy shields (Took a direct hit from 343 Guilty Spark's Sentinel Beam; which vaporized a Kig-Yar, can barely survive one hit from Fuel Rod Cannon in MK 5, withstood 6 of them in Mk 6, easily emerged from a large explosion unharmed in his MK6), **higher** with Overshield and Deployable Cover (Roughly two to three times stronger than MJOLNIR shields), at least **Multi-City Block Class** with Invincibility (Renders him virtuously impervious to all UNSC and Covenant infantry weapons, this includes Spartan Lasers, Wraith Mortars, and Scarab[1]beam), at least **Small City Class** with Bubble Shield (Repels all projectiles and nearly all explosions outside the bubble shield, withstood a several Megaton Nuclear explosion) | **Building Class** (Took multiple hits from Locke, and an extremely casual Ur-Didact), likely **Building+ Class** with shields (Can take hits from 2 Splinter Grenade sparks before being ionized), **higher** with Overshield, at least **Multi-City Block Class**

**Stamina**: Superhuman (Can last much longer on the battlefield than any of the UNSC marines and ODST soldiers, has the pain tolerance to continue fighting even when losing an arm. His stamina is further enhanced by MJOLNIR regeneration; in MJOLNIR he has proven himself capable of fighting with torn tendons in his limbs and even internal bleeding)

**Range**: Extended melee range; hundreds of meters with most ranged weapons, several kilometers with sniper rifles

**Standart Equipment**: Master Chief's Mjolnir armor lets him carry two small weapons or one moderate to large-sized weapon in the back, 2 small-sized weapons in his waist, and can carry small-sized weapons in his legs. (Although no Spartan to this date has ever done so). This is thanks to his magnetic weapon holder strips; and he actively uses one weapon or dual wields two small ones. He can also carry various pairs of grenades (Up to a total of 4 pairs as seen in Halo 3) and even carry grenade triplets (As seen in Halo CE). Most if not all Spartans also carry a knife, mostly use for CQC combat or assassinations.

* **Standard Weaponry and Equipment**:

* Armor
* UNSC Weapons
* Shields

* **MJOLNIR MK IV**: John's first suit worn during the Fall of Reach. Titanium plating offers great protection against gunfire. This suit also allows John to link with his AI Cortana. It also multiplies his strength, speed, and stamina a few times over. No energy shields make the suit very susceptible to plasma.
* **MJOLNIR MK V**: Suit John wears in Halo: Combat Evolved. Same features as his previous suit, except with an added energy shielding that offers him up to 15 megajoules of protection against plasma weaponry.
* **MJOLNIR MK VI**: John's most iconic suit; grants twice the protection his previous suit does and further regenerative capabilities for the energy shields. Physical capabilities are also likely further enhanced.
* **MJOLNIR GEN 2**: Armor Spartans wear in the new Halo trilogy. Does not feature many notable features, but it is lighter and further enhances physical skills than the GEN 1 MJOLNIR armors.

* **Additional Weaponry and Equipment**:

* Covenant Weapons
* Forerunner Weapons
* Power Ups, etc.

* **Type-25 Plasma Pistol**: Trademark plasma pistol of the Unggoy, Kig-Yar, and Yanme'e. Fires a small plasma bolt at a muzzle velocity of 108 m/s with an electric discharge of 20-45 Kilowatts, 300 - 450 Kilowatts when charged. **Wall Class** AP and **Subsonic** AS.
* **Type-25 Plasma Rifle**: Trademark plasma rifle of the Sangheili and Jiralhanae. Fires a plasma bolt at a muzzle velocity of 126 m/s with an electric discharge of 200 to 450 Kilowatts. **Wall Class** AP and **Subsonic** AS.
* **Type-50 Sniper Rifle System**: Covenant Particle beam rifle often used by Kig-Yar, and some Jiralhanae and Sangheili; Muzzle velocity is 3657 m/s. **Wall Class** AP and **Hypersonic+** AS.
* **Type-51 Carbine**: Infantry firearm often used by Sangheili, Jiralhanae, and Kig-Yar. Rapid fires at a muzzle velocity of 700 m/s. **Wall Class** AP and **Supersonic** AS.
* **Type-33 Needler**: Anti-vehicle weapons of the Covenant. Launches a sharp crystal like projectile at 54 m/s. **Small Building+ Class** AP and **Subsonic** AS.
* **Fuel Rod Cannon**: Trademark weapon of the Mgalekgolo; fires Incendiary gel at around 1 Gigajoule of energy at 72 m/s. It can kill Spartans in 2 hits, with the second one melting through Titanium and vaporizing their flesh and blood. **Small Building+ Class** AP and **Subsonic** AS.
* **Type-1 Energy Sword**: The signature weapon of the Sangheili, and the most iconic melee weapon in Halo. It's composed of two plasma blades of electrical energy that can KO Mark V and below Spartans in one hit and drain all of MJOLNIR VI and above shields instantly leaving them with just a bit of life left. Is one of the few weapons John has yet to master but is still quite skilled with one. AP may be dependant on the wielder, but at least **Small Building+ Class** when used by Spartans and Elites.
* **Type-2 Gravity Hammer**: Signature Two-Handed weapon of the Jiralhanae. This 85-pound club is capable of flattening Spartans and other comparable troops in a single slam. Is also equipped with a gravitational field that triggers when the head of the hammer hits the ground; this does bonus damage and pulls enemies closer to the hammer. Natural AP is dependant on the wielder, but likely **Building Class** when used by a Spartan or Brute, **higher** AP with gravitational field.

**Intelligence**: At least **Gifted**. As Doctor Catherine Halsey's favorite Spartan, John showed exceptional promise as a leader and soldier even at an early age. A natural leader, he rallied his fellow cadets to heavily injure and incapacitate a group of armed and trained UNSC Marines and steal their Pelican dropship at the age of eight. Since then, John has been trained in all forms of military warfare, being an expert in hand-to-hand combat, firearms usage, stealth tactics, and the operation of any number of military vehicles, being able to kill two elite ODSTs and maim three more when he was just fourteen years old. By the time of the Covenant-Human War, John was a decorated soldier who could turn the tides of battle almost single-handedly, leading UNSC forces to rout entire battalions of Covenant forces, being a key figure who was feared as "The Demon" by his opponents. Also, he gained extensive experience in the usage of Covenant and Promethean weaponry and machinery, oftentimes outdoing the original owners' in their ability to use said weaponry, managing to defeat the Didact's forces even though the Prometheans had spent thousands of years subjugating other civilizations.

**Weaknesses**: Master Chief's energy shields must recharge after taking an extended beating, leaving him open to damage for a few seconds. If he gets hit with enough force his armor might lock. Shields cannot regenerate while in the middle of rapid fire attacks. MJOLNIR regenerating shields grant little protection against blunt force trauma and close-quarters combat attacks. MJOLNIR shields and armor are very susceptible to electricity and plasma weaponry. Bubble Shields only protect from outside projectiles and explosions; all infantry troops and vehicles can easily run right through them. Is mentally unstable as of Halo 5, as mentioning Cortana will upset him greatly. Constant gravity 10 or more times greater than Earth can force his armor to lockdown

**Notable Attacks and Techniques**:

* **Spartan Charge**: John slams into his enemy while sprinting at full speeds.
* **Spartan Ground Pound**: While hovering with his thruster pack, John can perform a powerful ground pound attacking multiple targets within the attacking circle.

**Key**: **Without MJOLNIR** | **With Generation 1 MJOLNIR equipped** | **With Generation 2 MJOLNIR equipped**