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"Well, we can also do this pretty easily."
Ervas quickly separated himself into four separate entities, they were the four he was made of.
Apparently, not just Kireina, but all fused summons could actually separate into their former selves while distributing their total power around them all, and well, fuse back up whenever they felt like it.
It makes you think "what's the point of fusing then?!", but this is just a little thing they can do, they're still strong fused and will fuse at most of the time. They're all connected too, but if they separate, even if one die, it can go back to the other surviving ones and reemerge quickly without cooldown.
