After a demon attack a young witch was brought to camp halfblood and has to unravle the mystery of the monster uprising

Imagine, instead of seven, Hargreaeves managed to adopt eight. However, like Number Five, Number eight went missing... Only to appear somewhere else. Question is, Will she ever see the others again? It's basically a Five fanfic. However, there are relationships with the others. Y/N means you're name #1 in number5 on 2/03/2019 #1 in number 4 on 3/07/2020 The sequel 'change' is now for your reading pleasure