|Description||Regular program appearance|
|Equipment||Tron chute, Identity Disc|
|Allies||Dyson (former); Tron|
|Out of universe information|
Cyrus was one of the programs guarding the room where Dyson tortured his victims. He wondered why Tron didn't scream under the blade, as all the others had; his colleague's answer was simply, "He's Tron." Ordered to move Tron from the torture chamber to Clu's throneship, Cyrus was horrified by the gaping injuries Dyson had left.
Tron, seriously injured and barely capable of speech, was shackled in the recognizer that was to transport him, but Cyrus released him and bailed out with him while the recognizer was left to crash. He dragged Tron to safety, encouraging him to take heart and telling him he'd be all right. Tron asked why he was doing this, and Cyrus answered with words that Beck would later echo: "I can't let the revolution end before it has a chance to start."
- It is likely that Cyrus was named after the Cyrus-Beck algorithm, a generalized line-clipping algorithm.