|Voice Actor||Courtenay Taylor|
Jack is one of the most powerful Human biotics in the galaxy. She is an extremely dangerous criminal who has delved into piracy, kidnapping and murder. Jack is also known under the alias Subject Zero.
Jack's origins are shrouded in mystery, her family and place of birth are unknown. As a child, Jack was part of a large Cerberus experiment on the planet Pragia. The experiment was to enhance the Human biotic potential. Dubbed "Subject Zero", Jack was given every possible biotic enhance that was available. There were many other children within the Cerberus facility, many of which were deemed expendable and were subject to different trial experiments. Many of these experiments failed, causing the deaths of many children. Any of the biotic enhancements that were lethal were not given to Jack. Her powers eventually reached a level which proved lethal to the Cerberus staff. On one occasion Jack killed a Cerberus scientist by blasting him into a wall. Jack was kept separate from the other children, isolated in her private room. She believed the entire world was what she could see outside of her window. This was actually a one-way-mirror. The other children began to despise Jack, believing that they were suffering at her expense. The Cerberus staff would occasionally inject Jack with various drugs and force her into fights to the death with the other children. These fights were to test how far her biotics abilities had progressed.
During one particular test, the children began to use their biotic powers to riot, causing heavy damage to the facility. Jack was accidentally freed during the riot. Her biotic powers were in their prime, allowing her to escape with ease. Jack has difficulty recalling the details of the event. Her version of the escape is that both the guards and children hunted her, trying to kill her. She claims she was forced to them all. The logs within the Cerberus facility suggest that the children were staying close to Jack for their own safety, as the guards were given orders to keep Jack alive. The logs also suggest that they children may have been trying to kill her in a measure of revenge. No matter which version is true, Jack did kill most of the people within the facility. She was able to take a shuttle off-world. The shuttle was picked up a few days later by another ship. The crew of this ship used Jack's abilities for their own bidding before selling her as a slave. The Illusive Man would claim years later that the Cerberus facility on Pragia had gone rouge.
Following her escape, Subject Zero took the name Jack in order to sever any ties with her past. She has lived a violent life, joining various gangs, killing others and even spending some years as a pirate. On one occasion, Jack crashed a space station into one of the moon's of the planet Kahje. She also claims that she was once part of a cult, keeping the haircut after leaving.
Jack was eventually captured and placed in within the Blue Sun operated prison ship, Purgatory. While imprisoned, she was attacked by a gang of prisoners and guards, whom raped her despite her best efforts to stop them. However, when she healed, Jack killed every one of her attackers. This lead the Warden to place her within cryo-stasis in order to ensure her safety. He was eager to make a large sum of credits from Cerberus or other potential buyers.
Due to being subjected of many experiments and tortures, along with her criminal past, Jack is classified as a borderline psychopath. She has an extremely violent nature mixed with a fiery temper. She claims to experience "warm feelings during a fight" due to the drugs she received before each fight as a child. She has learned to gather positive feelings from combat situations because of this upbringing. Jack's entire body is covered with various scars and tattoos, which are used as reminders of her past experiences; the childhood experiments, prison, kills and other major events within her life. Jack has trouble trusting others because of the abuse she received during her life. She is angry and confused when Shepard tries to converse with her, as she cannot determine why Shepard wants to speak with her.
Jack is still suffering from her memories and wishes for closure. When she joins Shepard's team, she she does so in exchange for access to Cerberus files which detail the experiments Pragia. She asks Shepard to aid her in destroying the facility.
After completing the mission to Horizon, Shepard will have the option to to have casual sex with Jack. If Shepard agrees, a quick romance scene will play in the engineering deck. However, following the sex scene, Jack will no longer speak with Shepard, telling him to "f**k off" when attempting to converse with her.
If Shepard turns down the option of casual sex in favor of pursuing a paragon relationship, the outcome is very different. Jack will begin to soften and reveal more of her past. She tells Shepard that she has been taken advantage of multiple times after letting her guard down. Jack tells Shepard of her previous partner, who, rather than abandon her, died protecting her. He left her a recording on their ship that was to play in the event that he died. The recording talked about the future the two were supposed to share, the home he was going to build for them, and how much he loved her as well as saying sorry that it would no longer happen. She tells Shepard that she is confused and needs time to think things over. This attention is new to her and she isn't sure about how to handle it. Before entering the Omega-4 Relay, Jack comes into Shepard's cabin crying, and claims that he is right, she does need someone. The two embrace as a love scene occurs, ending with the two lying on the bed, with Jack smiling.
|Pull - Requires Level 2 Shockwave|
|Warp Ammo - Requires Loyalty|
 Subject Zero
|Rank 1|| Health: +5.00%
Weapon Damage: +6.00%
Power Recharge Time: -6.00%
|Rank 2|| Health: +10.00%|
Weapon Damage: +12.00%
Power Recharge Time: -12.00%
|Rank 3|| Health: +15.00%|
Weapon Damage: +18.00%
Power Recharge Time: -18.00%
|Rank 4|| Health: +20.00%|
Weapon Damage: +18.00%
Power Recharge Time: -25.00%
|Mass Effect Games|
|Mass Effect | Mass Effect 2|Mass Effect 3|
|Mass Effect Squad Mates|
| Ashley • Garrus • Kaidan|
Liara • Tali • Wrex
|Mass Effect 2 Squad Mates|
| Garrus • Grunt • Jack • Jacob|
Kasumi • Legion • Miranda • Mordin
Morinth • Samara • Tali • Thane • Zaeed
|Mass Effect 3 Squad Mates|
| Ashley • EDI • Garrus • Kaidan |
James • Javik • Liara • Tali
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