Monica

...and also, perhaps more interestingly, a key part of GRRM's short story "The Glass Flower", which (this is a bit of a spoiler) concerns a cyborg who keeps replacing more and more of his brain with electronic components, until there's no meat left, and he's effectively been uploaded, Ship-of-Theseus style. Even more of a spoiler: basically, the cyborg (which has memory continuity) winds up haunted by the ghost of his original meat self. Well, his mind is. Haunted.