Disclaimer: I do not own Xenoblade 2. Also, spoilers up to the end of the game, so be prepared!
It was the middle of the night at the Argentum Trade Guild. Chairman Bana checked to make sure that the Nopon watchmn, Melemele, was asleep, knowing that the Nopon was notorious for sleeping on the job. The coast was clear. Bana crept off his wheel ready for the night's work.
For months on end Bana had been working on another upgrade to the artificial blade, Rosa. This model of Rosa, dubbed Ultra Rosa, strayed away from the designs of the other two. Instead of the Lila-esque design, he had snuck into Tora's house, noticing the designs for Poppi QT Pi, and used those. Luckily for Tora and his father, QT Pi had already been built, so they never really noticed that Bana had stolen the designs.
Bana tirelessly collected the same parts that Poppi QT Pi was made out of, such as a few Bion Connectors, Golden Cogs, and Ambler Stigmas.
Eventually the villainous Nopon had finished his creation. This was not the same as Poppi QT Pi. This was a scaled-up version that, like the robot it was based on, wielded the Variable Saber. However, unlike the robot it was based on, the Variable Saber could also transform into a laser whip or a disc that shot projectiles of different elements. Unlike the current QT Pi, who was the Light Element, Ultra Rosa was Dark Element. This time, Bana had opted to make Ultra Rosa more like a conventional Blade so that he himself wielded the weapon, instead of driving in the robot's cockpit.
Bana let out a guttural, malicious laugh. Step 1 in his plan to fill his pockets was complete.
Step 2 was slightly less subtle. He Skip Travelled over to Hardhaigh Palace in Mor Ardain, ready to free his former accomplices. It was easy enough to get past the guards due to the fact that they were Level 20 and Bladeless, while Bana, who had trained himself to Level 50 on that wheel (decent exercise can level you up after all), unleashed Ultra Rosa. Once in the Tower Of Prisoners, it was only a matter of time