User blog comment:GoDai/GoDai's Translations: T.U.S., Exis, and Phantaminum (Pentaminum)/@comment-26656354-20150728083922

Exis are "creator of unerasable records", so the might explain why he couldn't kill Zahard and his blood (princesses). They're from outside the tower, so he can't do anything to them. I'm startled that SUI could come up with this creative world. He's truly a genius.