Claim: Keanu Reeves acted as Johnny Mnemonic in Johnny Mnemonic.
Evidence: A recurring character arc in many roles he has portrayed is one of saving the world , as can be seen in the characters of Ted Logan , Buddha , Neo , Johnny Mnemonic , John Constantine , and Klaatu.
Keanu Reeves plays the title character , a man with a cybernetic brain implant designed to store information.