I can imagine settings where digital companies for mental health would be a right. An external memory of who we are - to better process the context of ourselves.
as well as Various Habitats and colonies in the Sol System as well as outside of the sol system with Digital Companions.
to imagine if the Adventures of the PCs are in the context of a Digitial Companion Observer. the shades of gray and the trails are framed by the Digitial Companion as though the Player is the Digital Companion to the PCs.
Imagining a PC who had so much memory loss the Digital Companion rebuilt the PC from what it stored. Overlaying broken memories over assumptions of the Digital Companion.