|This article is fanon and not part of the Halo universe. The author of this fanon is RavenRT.|
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- "We created the Flood. It's our job to rid them - Not the Humans'."
- —The Savior after the first group of Promethean Knights were made
|Improbulus "The Savior"|
|Vehicles||A small number of Forerunner frigates|
|Chronological and political information|
Improbulus (meaning Defiant), or the Savior, was a Forerunner general and saviour of many thousands of humans, thus earning him the title of Savior.
After seeing the Didact convert humans into Promethean Knights to fight the Flood, the Savior refused to fight alongside the Didact, and eventually deserted and went into hiding. He did, however, secretly prevent many more humans from being turned into Promethean Knights. After months of wandering and hiding as a nomad, he was found by Promethean Knights. He killed them all, and was later turned into a Promethean Knight himself. Many years later, the Librarian converted him back into his original form. After this, he did everything in his power to prevent the Didact from creating any more Promethean Knights. He also made enemies with his former friend, the Pariah.