This is something that both confuses and perplexs me and my Girlfriend... According to the timeline Aiz joins the loki familia around 8 years before the story takes place... As a Level 1, which means the logic of why Finn hasn't aged doesn't apply. Yet she is supposedly 1000 years old or at least was born that long ago according to the timeline... Loki only came down from heaven 28 years ago, and during that time recruited Finn, Gareth, and Riveria, and then after the Zeus' familias exit, Aiz, who was a little girl. How is that possible, and what does it mean?  Wouldn't it make far more sense that Albert (Her father) may have been born that long ago, and they took on the grand quests over the course of those years and only recently, just before they were nearly wiped out, Albert included, had Aiz? and I quote "Zeus' Familia was one of the strongest Familia led by Zeus before they were weakened and forced out of Orario 15 years before the start of the story."  Making her in actuality only 16 give or take the aging process slowing when she became an adventurer.

     So her father was 1000 years old and having been born that long ago, but just before Albert and everyone died fighting the OEBD 15 years before the start, He(Albert) and her mother(Aria) had her(Aiz). She is a small child when it happened(My guess is around 1-4) and she has very little memory of what actually happened(Though that could be from trauma)(We also never see little Aiz talking in those memories)... Aiz goes on to join Loki Familia at age 7, takes a year to become lvl 2. and so on making her age slower from there. Would that or something like it not be more likely?

Discuss please I am very curious.

  I'm just very confused by the claim that she herself is 1000 years old as there is no evidence to support this... and everyone who claims this says it's hinted at repeatedly... I've read the light novels up to SO 4 and main Danmachi 9 and haven't got that impression at all....  Just that she has secrets in her past.