Peroxy 
"[@Scintilla Aquila":](/images/2206984#comment_8648841
-)
~~Tvtropes saves the day with the trope/term "Living Shadow", but it's not a tag here.-
~~
(Well, maybe not quite - the trope is a bit more literal.)
It's"[this one":](https://tvtropes.org/pmwiki/pmwiki.php/Main/TheShadowKnows), actually. Not sure if that helps, I still couldn't find anything.
One Minute to Midnight
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~~Tvtropes saves the day with the trope/term "Living Shadow", but it's not a tag here.
(Well, maybe not quite - the trope is a bit more literal.)
It's