Frightened 

"They're really primitive, but like us, they're also capable of cultivating immortal energy. So don't underestimate them, Maarqrens. We have many advantages, but we're not invincible." The Commander commented in a deep tone, speaking in a language Minos and his people wouldn't understand. "The techniques they create are compelling and mysterious. Without our technology, we would have trouble facing them."

"So what does the Commander want me to do?" Maarqrens asked, thinking it unlikely that the primitive races of this world would have noticed them.

Their technology was advanced compared to what existed in the Spiritual World. With them, they had accidentally arrived in this world about 550 years ago. Since then, they have been operating in this world without attracting unnecessary attention.

When they arrived in this world, the group of 2,000 space explorers from the Mechanic Empire had found a world similar to their own where immortal energy existed.