Seraph Empyrean is one of the highest, if not the highest ranked angel type monster.
- A Seraph is a member of the First Sphere in the celestial hierarchy in Christianity. Regarded as one of the highest tiers of angels who are closest to the throne of God.
- While none have been encountered so far, Seraph Empyrean is said by Ainz himself that he would have to fight it at full strength in order to defeat it.
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