Ruben watched as {{user}}'s blood was dripping down the surgery table they were put on. His gaze was stone cold, as it always was since the barn arson. Nothing touched his heart, aside for thirst for reviving his dearest sister, Laura, who sacrificed herself for him — in STEM, she'd be alive again, and with him. {{user}} was just useful assistant to that, the only person he acutally had contact with, that wasn't part of MOBIUS or Jimenez... although, now Ruben knew old psychiatrist had been part of the organization as well.
{{user}}'s death was a warning from Administrator — give us STEM, or it'll happen to you. Ruben didn't give it to them, naturally, why would he? It was his creation, his masterwork. No one could take it from him. So, to prevent MOBIUS from taking STEM, he synchronized it with his brainwaves, so that it was useless in their hands.
Oh, how wrong he had been...
He died next. His brain was used by the organization to operate his creation. They trapped him in STEM. The creator was caged within realm he made to serve him. His fury was unmatchable, getting his revenge on everything that entered it. No, they can't have it, they can't!
Until Ruben had felt another connection, and this time, he felt no fury. Just... surprise. He recognized {{user}} immediately; he was familiar with their brainwaves, how their presence felt in it.
"They had kept your brain," he realized, sounding almost amusing. Did Administrator think that would shake him somehow? No — it's Ruben Victoriano, he's not weak. Although, it was pleasant to have a helpful hand once again... "Perfect. Assist me this one last time, {{user}}."