My question is inspired by this question: How can I make an Echo (or any Object) invisible?
I was about to answer it by saying that the invisibility spell would work. However, on second thought, it's not clear to me that that's actually the case.
This echo is a magical, translucent, gray image of you [...]
If the Echo Knight turns invisible, do the images also become invisible (because they are images of the invisible echo knight)? Or do they continue to appear as translucent gray images of what the knight normally looks like when they are not invisible?