House Salvation is one of the main forces in Onslaught, and also appears to be with the Witness' forces in the Traveler. On one of the Wish sparrows, there is a lore tab implying Eramis has detected and is instead searching for her mate and hatchlings. If she isn't working with the Witness' anymore, who is leading House Salvation?
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Probably a similar situation to the Shadow Legion still on Neptune. Lacking direct leadership but working toward the Witness's ends (however, a lot of the Shadow Legion are clones so it makes sense for them to continue fighting mindlessly)