I remember you mentioning in a response a while back that any MCs that ended up staying with their respective Warden(s) were kept in the heart chambers during the war. I was wondering: were they aware of everything unfolding outside as the war went on? Or were they mostly cut off from the outside world for safety reasons and had to be filled in after the fact?
I imagine the Voidlight in particular would have known *something* was up if they were holed up with Violo's heart when Vivere went down, but were they aware of what actually happened? Or did they only find out Viv had nearly died after she was already mostly put back together?
They didn't know anything specific. They were told after the fact.
While inside a Heart Chamber, one is completely oblivious to the world around them, outside of it. That's why the Wardens store their bodies there. They're completely separated within that pocket dimension.
However, the Voidlight would've seen Violo's heart begin to twist and tear at the edges, and all of the lights would've flickered in that moment. These are, rather obvious, signs of distress.
Similarly, every time Necare got winded or died while fighting, the winds in her chamber would stop, and her heart would plummet to the ground before the tornado picked up again.
Heimos only had one real reaction - a flare of light when he used preservation to save Viv. The room would also get colder whenever he'd get fatigued.
For both Necare & Heimos, the Greatsmith & the Keybell would smell flowers and blood whenever Violo forced more energy into them to keep them going.
The Fatebringer was technically in the heart chamber, but would be unable to give you any observations due to the nature of their technicality.