The Backstory

1: ARR:Gaige was the same as any other Gaige until just after the events of the final DLC for Borderlands 2, Commander Lilith and the Fight for Sanctuary. She stopped the Warrior, Hector, all sorts of bad guys.
Prior to this she was a student on Eden-5 who had to go on the run after her Science Fair invention, Deathtrap, was provoked by a bully and ended up killing the bully.Upon her arrival to Etheirys however, she hound her arm had been replaced with one of flesh and blood once more. That meant that Deathtrap would be stuck at home...
Until she encountered the Scions and signed up for the Order of the Twin Adder in Gridania where she got her Chocobo! ...Naturally she wanted her bestie there even in spirit.As she works with the Scions, a few unusual adventurers also start to work with the scions on and off. Popola and Operator 6O with the Red Girl somewhat appearing as well.Popola: White Mage
Red Girl: Black Mage
Operator 6O: WarriorThey helped when more than Gaige was needed and disappeared as quickly as they arrived every time------------------------------------------------1a: Popola and 6O:The two androids had been made when the Red Girl wanted to send out scouts to other shards in the form of androids. making sure they were made of materials native to the First so they wouldn't disappear should something go awry. The Android Copy of the Red Girl on the source was also made this way.Unfortunately for the duo, their origins meant that 6O was afflicted by the Logic Virus.
Over time she did learn to keep it in check but can be seen when she uses 'Inner Release' as a WAR with her eyes glowing red for a short while.She only does this if Popola is there to bring her back from the brink should something go wrong.----------------------------------------------2.1: Shadowbringers:Events between ARR and the start of ShB go mostly the same. its upon Gaige's arrival in the first that things change.As ShB wraps up, Gaige encounters 2P at the Copied factory and events are set in motion. her presence is noted by the Red Girl and interest is heightened in the Hyur's skills.
This is only further piqued when the events of the Puppets Bunker occur.This prompts the original Red Girl nestled in Paradigm's Breach to recall the android copies of herself to the First from their scouting missions as they foresee an attack soon...
But the Red Girl on the source had opened up to the denizens of this star. She didn't want to be their end! She was in no rush to get back to her creator and save them.In fact, by the time she gets back there the Original Red Girls had been dispatched twice.
One by Gaige herself and a myriad of other adventurers...
But again by Gaige... Who had an android signal to her.The Android copy of Gaige turned and drew her weapon on the Red Girl... But was met with no such gesture in return.
They talk it out a bit, The Red Girl wishes to distance herself from her creator and so takes on her proper designation. N2.
The duo start to find a way for the 2 of them to get back to the Source.-----------------------------------------------2.2: Tempering.The real Gaige was unaware of what was transpiring in her wake at Paradigm's Breach, sitting idly in her apartment while waiting for the Sharlayan Papers to go through...
Of course her branch was most disappointed to see this! She could've been in Il Mheg visiting!Enough was enough!Feo Ul took a bit from Lightwarden Titania's Playbook and grew herself to take up a fair bit of the apartment, trapping Gaige beneath her rump!
But... As fate would have it, gaige would get a taste of her next foe's power. Emotion, aka Dynamis.With the two's connection, both Feo's love for her sapling and Gaige's with her BIG Branch... The Dynamis they shared allowed the Traveller's Ward to be bypassed and Gaige to be mutually tempered to Feo Ul.She was never a Fanatic about it... Maybe... But she did absolutely enjoy being with her branch more and more!-----------------------------------------------2.2a: Giga:It was shortly after that Tempered Gaige encountered Giga, a Male Lalafell who was lounging about in Il Mheg in his massive form! Standing... Er... Sitting as tall as the several of the tallest Elezen around on each other's shoulders!Given that she adored size things, she quickly came to know him quite well before her trip to Sharlayan.-----------------------------------------------3.0: Endwalker:While the two androids were on the cusp of finding a way back to the source, gaige ended up paying a visit to the Crystarium to head back in time to the time of the Ancients.However one BIG change happened to occur. During the visit, Feo Ul showed up and Gaige ended up being made into a Lalafell by Feo.It did not stop her from saving the star! After which, she ended up marrying Giga and... Who ought to make herself known than Android Gaige and the Red Girl.It was discussed between the 4 of them and Lala Gaige would retire for now with her loving husband in their home in the Lavender Beds... While Android Gaige takes the mantle of the Warrior of Light to prevent panic!
Not just from Gaige stepping away... But she was a Lalafell now-People might ask questions-From here, Android Gaige takes the reigns for the time involving the 13th and into dawntrail! Where she may be getting closer to the Scion's Resident Hearer, Krile Baldesion.

-----------------------------------------------Misc Tale 1: Thaumaturge GamingAs Android Gaige emerges from the Palace of the Dead, she has a triumphant look on her face. While she had willingly conceded on floor 140 despite the boss being easy enough, she felt she had proven her point.That was when she ran into a Lalafell... His old name is irrelevant as he was awestruck by her tale and her achievement! She didn't seem human to have achieved that! Yet here she stood.He took her as an inspiration to do something similar and so he took up the name 'Thaumaturge Gaming' and set out to prove himself as this mysterious lady did!