User blog comment:Pualover/Overlord Power Level/@comment-96.227.219.59-20150928193147/@comment-96.227.219.59-20150928194808

I have a theory that Rubedo might be level-breaking, like the level-breaking bosses in YGGDRASIL, since she's very strong, yet doesn't appear in the volume 7 image of all level 100 NPCs of Nazarick. The mysterious NPC is assumed to be the Area Guardian of the Cherry Sanctuary, and Gargantua doesn't appear presumably because he comes from the dungeon Ainz Ooal Gown conquered and made into Nazarick, and therefore isn't actually "of" Nazarick.