Another

Wallace observed the golden-skinned alien race as they approached the golden airship of the Seiji's Alliance…

He wanted to see how they would act in front of these magicians.

'They didn't even bother sending one representative from the Empire… Are they going to attack?'

Technically, the Khrusam Race isn't part of the Empire but allied to it… They are most likely hired as the Empire's vanguard while they are still unsure about the power of the magicians…

After all, using an unusual power against an unknown power can be useful at times…

Nevertheless, sending them out for negotiations doesn't seem right at all… After all, there was no way for them to decide for the Empire's actions… 

On the other hand, the Grand Sages and Grand Arcanists on the airship were unaware of this…

They just looked at the approaching aliens that are standing on top of a floating metal board.