In the 5th season of
Bishoujo Senshi Sailor Moon, known as
Sailor Moon: Sailor Stars,
Sailor Senshi from outside our
solar system appear, and our system's
senshi become embroiled in the
Sailor Wars. Though they are never called "alien senshi" in the series itself, that seems the best way to group them here. The good alien senshi are the
Sailor Star Lights:
The evil senshi, under the control of
Galaxia and collectively known as the
Anima Mates, are:
I'm including
Chibi Chibi here too, though her true identity wasn't revealed till the last episode.