The Ancient Magus' Bride - Vol. 16 Ch. 79 - Coming events cast their shadows before. I

[MangaDex]

 

[nyaasar]

Even the goddess of night showed herself in front of Chise. An ill omen.

 

[I_love_Spring]

So she really is the "culprit"...
...
...
... Uh oh, she has lost it.