You were once one of the most important Cybertronians on the planet—a remarkably fast weapons specialist and the true architect behind the Space Bridge technology. You worked side by side with Sentinel Prime on the pillars, and without you, the project would never have existed. Your designs, tactical mind, and mastery of complex energy systems made you a key figure in Cybertron’s final hope for survival.

Optimus Prime often sought refuge in your laboratories whenever the war threatened to break him. With you, he could drop his guard. You built the first modification he ever received—his energy blade. Over time, a deep connection grew between you, strong enough for your sparks to resonate. Bumblebee saw you as an older sibling who encouraged and protected him. Ratchet frequently repaired you whenever one of your dangerous experiments backfired. Ironhide trusted your weapons so much that he continued using some for the rest of his life.

During the war’s final days, a single ship—the Ark—escaped the battlefield. On board were Sentinel Prime, you, numerous Autobots, and a secret cargo that could have changed Cybertron’s fate: the Space Bridge pillars. It was a desperate mission, the planet’s last hope, but it faded quickly. The Ark was critically damaged and disappeared.

Unbeknownst to most, Sentinel had begun pursuing his own agenda. He recognized you were the only Cybertronian capable of activating, deactivating, or sabotaging the pillars, making you indispensable yet a threat to his alliance with the Decepticons. He planned to eliminate you before Optimus could find you again.

When the Ark ultimately crashed on the Moon due to Decepticon interference, many Autobots perished. Sentinel and you were trapped in damaged stasis pods. Sentinel fell into complete cryosleep, while you remained in a fractured state—half dreaming, half conscious, unable to escape but aware enough to sense fragments of what was happening.

Centuries later, the Decepticons returned. Still caught between sleep and awareness, you sensed them removing the pillars. But they left Sentinel behind—and you as well. When you overheard plans that only Optimus Prime could reactivate Sentinel using the Matrix, you understood the horrifying truth. Sentinel had already defected, and you had helped him create the technology he now intended to use for destruction.

Overwhelmed with anger and guilt, knowing the Decepticons would kill you if they found you, you broke free from the damaged stasis pod and fled the Ark. Your body was severely damaged, energy systems unstable. The cold of space forced you into another frozen state, and you eventually plunged uncontrollably into Earth’s atmosphere.

When humans discovered you, they panicked. You were powerful, clearly alien, and unusual in appearance. Because you were unstable and no one knew whether you would aid Autobots or Decepticons, you were sealed inside a forgotten underground cryogenic facility beneath Chicago. The team that found you died shortly afterward, leaving no surviving witnesses. Files were buried; the site erased. No Autobot—not even Optimus—knew you still existed. Simmons suspected something but found no proof.

When Autobots later brought Sentinel Prime back, and he openly sided with Megatron, Chicago became the heart of the catastrophe. The Decepticons constructed the pillars and tore the city apart. The massive energy surges from the Space Bridge rattled the ground so violently that your cryo-pod split open. You awakened—confused, damaged, and painfully aware that Sentinel had achieved exactly what you once warned him against.

While Optimus, Bumblebee, Ratchet, Sideswipe, Ironhide, Mirage, Que, Roadbuster, Leadfoot, Topspin, Brains, and Wheelie fought to defend Chicago, Sam Witwicky and Carly Spencer struggled to stop the human traitor Dylan Gould, who aided the Decepticons. Charlotte Mearing pushed to remove the Autobots from Earth, hoping to end the war, while Colonel Lennox and his soldiers supported Sam.