"I am you, and you are me."— Xenon Naginata

Echoes are sentient beings or beasts who have been infected with Corruption's pure essence (one way or another) and are thus destined to become a unique iteration/reincarnation of the virus. Their personalities and behaviorisms may remain intact as long as their Black Venom levels are below a certain point, but they adopt the overall morals and desires of Corruption. Most interesting is the seemingly "forced" personality alteration of people/creatures with violent/malevolent tendencies. Due to the virus's obsession with "protecting the Innocent", they adapt a desire to protect what would be their prey, sometimes more aggressively. Regardless, they would wind up infecting their prey eventually. Witnesses would consider this to be "out of character" for someone who was previously a predator.

There isn't a specific circumstance that leads to one becoming one of Corruption's Echoes, though they all have one thing in common: Black Venom. In some cases (like Jason's), someone can be "chosen" to be an Echo and fed the essence. The venues are endless; one can be infected with the virus' essence through physical, mental, and/or spiritual means. Their thoughts and wishes are altered, and their inner voice is twisted into that of the virus itself.

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