Lin.
She simply left.
While she was inside the Wraith realm, she was able to simply disappear in front of Gu Qing Shan's eyes and enter the angel world.
Gu Qing Shan was absolutely sure that Lin did not trigger the Wraith realm's barrier when she left.
Which means----
She's still within the Wraith realm?
Or rather, the angel world is actually a part of the Wraith realm?
Gu Qing Shan tried thinking for a while but still couldn't come up with anything to clear the situation up.
This couldn't be helped, there were so many secrets within the infinite world, let alone a place like the Wraith realm that actively hid everything that it could.
Gu Qing Shan sighed, then looked at the pocket watch in his hand.
This was a grey pocket watch with a thick cover, it seemed unassuming at a glance, constantly giving off a ticking noise.
Editor: Dr.Lock
Proofreader: Arya
Link to the WAO glossary page for all confusing terms and more: https://otakutl.blogspot.com/2020/02/wao-glossary.html