Origin
Pandora
Gaige is a Mechromancer. She is the fifth playable class in Borderlands 2, first revealed at PAX East 2012. Gaige was added as post-release downloadable content released on October 9, 2012 for $9.99 USD / 800 Microsoft points / $14.40 AUS. Those who pre-ordered Borderlands 2 received the character free of charge. Her skill grants her the ability to control the D374-TP, or Deathtrap. She is also used as a marketing tool outside of Borderlands 2 where the character chats on Twitter and releases ECHO logs. Gaige was a high school student from the planet Eden-5. She originally conceived Deathtrap, then called DT, as a science fair project to combat bullying. Her rival, Marcie Holloway, was a contestant in the science fair as well, and used her father's money to buy her way through the competition. Marcie apparently stole Gaige's DT designs and sold them to Eden-5's police force. On the day of the science fair, Marcie's father bribed the judges, helping win her first place with a defective robot based on Deathtrap's blueprints. Gaige placed third. Marcie then shoved Gaige, causing Deathtrap to identify her as a hostile. Deathtrap attacked with its claws, causing her to explode due to a miscalibration by Gaige. Gaige was escorted to the principal's office, and faced expulsion and arrest for accidentally murdering her rival. She called her father to create a distraction to help her evade arrest, and bought a ticket to Pandora, where she stowed away on a train leading to Windshear Waste.

Borderlands (Franchise)
Borderlands is a series of action role-playing first-person shooter video games in a space western science fantasy setting, created by Gearbox Software and published by 2K Games for multiple platforms. The games in Borderlands take place on the planet Pandora. Pandora is believed to be rich with mineral wealth leading several megacorporations to send colony ships there to capitalize on it, but once they arrive, they find little of value outside of undecipherable alien artifacts from a race known as the Eridians, and numerous native lifeforms make it too dangerous. Many of the corporations abandon the planet, leaving behind their workforce, former prisoners coerced into employment, who take over much of the planet as bandits and raiders. However, a study of the alien artifacts leads to the discovery of mythical Vaults filled with untold treasure and wealth. Corporations and military forces return to the planet, along with a number of Vault Hunters who seek to find the vaults themselves. The settings are expanded to include the moon of Pandora in Borderlands: The Pre-sequel. In Borderlands 3, the game takes place on Pandora, Promethea, Eden-6, Athenas, and Nekrotafeio.