The student that Sofia had talked to did not go to the cemetery along with the others since they had other things that they needed to do but all of the other students that they hung out with had supposedly gone there during the time they had planned to.
That was the main point that made Sofia spot something unusual about it.
If the student had been able to avoid going while others did not then the student managed to escape being caught up within the same circumstances as all of them.
Those circumstances were most likely related to an Evil Spirit and it was likely quite a powerful one that was not from a lower grade.
While it could be weaker than a lot of other physically powerful Spirits and Evil Spirits, it could still use various means at its disposal and if it was quite powerful in grade, it would be far more difficult to deal with.
