Glossary
Living Receiver
The person chosen to return the Artifact to the Primary Universe. Donnie Darko is the Living Receiver of the film.
Nobody knows how a Receiver is chosen. Once chosen, they gain Fourth Dimensional Powers (strength, telekinesis, mind control, fire and water) and suffer visions and hallucinations for as long as the Tangent Universe lasts. The Manipulated around them "will fear him and try to destroy him".
Donnie's diagnosis of paranoid schizophrenia is the Primary Universe's explanation for what Sparrow describes as the Receiver's condition. The film lets both readings coexist.
Defined in The Philosophy of Time Travel