Jack (Mass Effect)
Mess with someone's head enough, you can turn a scared little kid into an all powerful bitch.
~ Jack, describing her past


Jack, also known as Subject Zero, is a notorious criminal whose crimes include piracy, kidnapping, vandalism and murder. She is also a biotic, possibly one of the most powerful human biotics alive, and is considered so dangerous that she was kept in cryogenic stasis after she was caught. She is a potential romance interest for a male Shepard.

Powers and Stats

Tier: At least 9-B with firearms, High 8-C with physical strikes, at least 8-B with grenades, at least 8-A with Biotics

Name: Jack, Subject Zero

Origin: Mass Effect

Gender: Female

Age: In her mid 20s

Classification: Human, Biotic, Former Criminal, Teacher and Combat Instructor of Grissom Academy

Powers and Abilities: Superhuman Physical Characteristics, expert markswoman, expert grenadier, expert hand to hand combatant, Mass Manipulation (can increase/decrease/fluctuate the mass of a given volume of space via mass effect fields created by his/her Biotics), Telekinesis (can move objects with her mind through mass lowering fields or root them in place with mass increasing fields via Biotics), Kinetic/Biotic Barriers, Energy Blasts, and Gravity Manipulation (Through Singularity)

Attack Potency: At least Wall level with mass accelerator weaponry (Slugs fired by mass accelerator weapons can reduce large chunks of rock wall to rubble in a couple dozen rounds as demonstrated by the YMIR mech during the assignment N7: Mining the Canyon), Around Large Building Level with physical strikes, City Block/City Block level+ with Grenades; At least Multi-City Block level with biotics (Biotics are shown to be powerful enough to completely halt the movements of the Human-Reaper via Stasis. Also, a fodder Asari Soldier was more than capable of erecting a biotic barrier able to withstand multiple high explosives from a Gun Ship on Thessia [Said high explosives should at least be comparable to the mass accelerator cannon of the Mako or High Explosive Rounds from the first game (Said weaponry is capable of incinerating human sized objects at the edge of their detonation radius)]), possibly higher (is considered one the most power biotics in the galaxy)

Speed: Massively Hypersonic (Comparable to James Vega)

Lifting Strength: At least Class 10 (Physically comparable to the Shadow Broker); Class 100+ with Biotic Amplification via powerscaling

Striking Strength: Large Building Class via Powerscaling

Durability: At least Large Building level without kinetic barriers; at least City Block level with kinetic/biotic barriers.

Stamina: Superhuman+

Range: Several dozen kilometers with mass accelerator weaponry, several dozen meters with biotics abilities, average human melee range with punches.

Standard Equipment: A pistol, A shotgun, an omni-tool, a biotic amp(s) and some grenades.

Intelligence: Gifted, is one of the most skilled biotics in the Galaxy.

Weaknesses: Kinetic barriers fail to deflect attacks with a high enough energy to surface area ratio (Can safely deflect high-velocity projectiles in-universe, but fail to be effective against in-universe melee attacks and directed energy weapons). The shielding of kinetic barriers does not protect against extremes of temperature, toxins, or radiation.


  • Survived the experiments of Cerberus as a child and become one of the most advanced biotics known
  • Survived the "Suicide Mission" alongside Commander Shepard
  • Trained a squad of biotic recruits and fought alongside them during the battle against the Reapers


Notable Victories:

Notable Losses:

Inconclusive Matches: