Without any warrior class aliens, the rest of the aliens stood no chance against Selena and the others.
Noelle and Alavenya helped Flora take down the aliens on their side and started sweeping the rest of the aliens from Risa's side and gradually made their way toward the opposite direction.
Still, it was quite surprising how Selena was able to hold back thousands of aliens by herself. It was true that Sera helped her, but she just amplified her power and Brunhild only took the side Risa had almost wiped.
The battle against these aliens actually lasted three times longer than the battle against the mutant, simply due to their number. They had to ensure that every single alien died so that there wouldn't be any ambush when they were extracting their cores.
They definitely used too much of their ena, though. Most of them had exhausted their ena.
