After the battle, Elena asked the people of the spaceship to stay in this part of the void on standby for some time. During that time, she was going to take Hongjuan to PALDORA to hand him over to the elders. With this man, who was the main mastermind behind Oblivion captured, the war should also come to an end.
As for if the crew of the ship would try to run away or not, there was a high chance that they will. So Elena created a living being with her creation magic and asked that being to keep an eye on the spaceship. If they tried to run away, this being was strong enough to stop then for at least some time. That time would be enough for Elena to be notified about this matter and to take action.