The soul of Aster was at a loss, hearing Eren call him a Transmigrator. Other than the real Aster, no one knew that his soul wasn't something that came from another world.
He didn't understand how this man knew about it. Was it because of some ability that allowed him to see through the mysteries of the universe? Or was he also...?
Just the possibility alone was enough to scare Aster. If Eren was also from his world, that meant he was also a Transmigrator.
He wanted to ask Eren why he was doing all this?! If he was also from earth, that meant they were on the same side. Why was he trying to enslave him instead of working together? Did the world already corrupt him?
Unfortunately, he could not say anything. He could not even open his eyes as his body wasn't completely healed yet.
Eren also didn't know if the two souls inside Aster's body could hear him, but it didn't matter either. As long as the Seal was successfully casted with the help of the Ghost Queen, he was going to get another helper.
One of the goals before him was to kill all the Transmigrators. However, it was easier said than done, especially if he was all alone.
Moreover, Aster's ability itself was poison for him which he didn't want to drink. Instead, he would rather use that person until he ran out of uses.
As for killing Aster, it was something that he could do even in the future. With the Seal, it was as easy as snapping his fingers.
He needed Aster, it was an undeniable reality. Aster was the Vice Dean of the Academy. After Mist, he had the most control over the Academy.
Placing his puppet in the position of the Vice Dean was so lucrative that even he couldn't reject it. He also needed someone to keep an eye on Eldric and the Prophet after all.
Instead of finding ways to deal with the Prophet and risking exposure of his identity, he would rather use Aster in this game of chess.
Without his memories of the Academy, it was almost impossible for Aster to successfully take control without being caught.
Eren also didn't plan to erase Aster's memories. One soul belonged to an earthling. If he erased the memories, there was no use of this Transmigrator. The second soul belonged to real Aster who was even more useful.
With real Aster being enslaved, he could ask him a lot of questions regarding the past. With others, he still had to be hesitant as he was worried that his identity was going to be exposed. With a slave like Aster, he didn't have to worry about it.
It was especially the case as Aster was also involved in the disappearance of the real Devourer, possibly even knowing the past of Ren Necroline that had always evaded him.
If things worked out as he planned, he wouldn't need to chase after the Memory Fragments. He could also have more information to deal with the Author when using the Question Voucher which was already in his inventory, waiting to be used.
He left the memories of these two souls intact, only making them serve him while still carrying their thoughts and memories.
With that, his role came to an end. All that was left was for Ghost Queen to complete the healing process and bring Aster back to life.
For now, Eren could only stay back and watch.
He walked back to a distant table and sat on it, observing the body of Ancestral Elder Yang drying up as his life force was being forcefully sucked dry.
He didn't feel any pity for that person who had blackmailed him into coming here. If anything, he was quite pleased with it.
"That's what you-" He opened his lips to speak, only to stop abruptly as he felt a familiar aura spread across the entire academy.
"She is back?"