Data ghost

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A data ghost is a rare phenomenon, in which a deceased party can leave an actual physical impression on the physical world if they carry enough metaphysical weight.

Fiction

2005 IDW continuity

Months after Rewind, an Autobot archivist, who had stored centuries worth of data inside himself via a head-mounted camera, perished, he began making unexplained appearances around the Lost Light. Nightbeat theorized that Rewind's plethora of stored information had given the tiny 'bot enough metaphysical weight so as to leave behind a data ghost, which was what had been appearing on the Lost Light. Towards Peace Words Hang in the Air