A birdlike Aurelian historian who uses the Guardian of Forever alongside Kirk and Spock, on the research trip during which Spock's own past is accidentally altered.
Aleek-Om is a historian of the winged Aurelian species who appears in the Animated Series episode Yesteryear.
He is part of a Federation research team working at the Guardian of Forever. While Kirk, Spock and the historian Erikson travel through the time portal to observe the dawn of Orion civilisation, Aleek-Om and his human colleague Grey remain behind and use the Guardian to review recent Vulcan history.
When the travellers return, nobody recognises Spock, and an Andorian named Thelin is the Enterprise's first officer. Aleek-Om helps to work out what has happened: because Spock was away in the past while the Vulcan records were being played, he could not be present, as his adult self once was, to save his seven-year-old self from death in the desert.