@achilles100 An alt-Earth Dr. Fate is narrating.
There are a couple of alternate Supergirls later in that issue. Judging by her bust size, one may actually be a version of PG. (But then PG is an E2 version of SG anyway so whatever.) They both have S's on their chests and one is referred as Supergirl and the other as Zor-El (by two alternate Wonder Womans). Strangely both of these have some kind of ESP ability.
@kazuma_bushi Mine is the print copy, numbered #7 and dated Mar 15. It seems the online version is split up into smaller chapters which combine to make the print issues.