I have a feeling I know who that is.
The Saint 14 ship has similar wavy streamers coming off of it, and the lore entry for it states that Saint was more than likely off to meet his end. Could be his final resting place.
Odd that the Vex would almost have it set up like an altar...but 14 was an Exo, perhaps the Vex see him as a sort of comrade?
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See that's what I was thinking! I was looking into the lore and it brought up Saint-14. And her ship does exactly this. Curious as to what this will become!