User blog comment:Zack Tan/Volume 7 Intermission/@comment-177.243.69.84-20150907065239/@comment-73.162.38.142-20150907075157

Thanks for this. I've never played a mmorpg before, so this gives some good background here. BTW, all of the NPC's in Nazarick are immortal, so Ainz won't have to worry about them growing old and dying out. This was discussed when the Guardians where debating whether to accept Tsuare into Nazarick, and someone was saying that Mare and Aura were human (e.g. dark elves), but then some other Guardian else replied that they were immortal, so it's hard to classify them as humans.