What does a savior save if not the "eternal soul"?

"Eternal soul" is not my term. I didn't introduce it. I have no particular interest in it. So, if that's what you want to focus on, it's your choice. If you do so, I do hope you'll rely solely on Jewish sources.

At least one participant has averred that "HaShem is the only savior."

Of whom? or of what? for what? from what? How?

P.