Spirit World
The eight figures extended one of their hands as a giant opaque barrier surrounded the girls.
"Centakin. Let's go."
"Go we shall Bravakin. I trust the rest of you will keep this barrier up for now."
The rest of them nodded as the two disappeared into the barrier.
Soul Realm
After an intense interrogation session, here is the summary of what I'd gathered. All the Elder Spirits were students from Earth who were originally teleported here. Eight people had summoned them, which they later referred to as the eight kings. The kings then proceeded to gift them abilities and send them to this world to govern it in their stead.
"Now that you have attacked us, it won't be a surprise if the Heavenly Kings come to our aid. Soon, you will die."
I sighed as I grabbed her by the neck.
"So what? I can just kill them too."
She smiled as blood spurted from her mouth.
"You have no idea how powerful the Heavenly Kings are. You will seem like an ant in front of them."