Jung Hayan/Plot

First Timeline
In the Black World, it later showed that it was Lee Kiyoung (who fully went evil) physically/mentally abused Jung Hayan because she loved him. In an act of desperation to get MC's attention, she hung herself because then "he would remember her forever and meet again in the next life".

Second Timeline
She was running from the monsters in the Tutorial when she encountered Lee Kiyoung and Park Deokgu and was saved by them. Later she met Kim Hyunsung and the camp he set up. She was judged by Lee Jihye to be useless and so was made to work around. Later, she became part of a commotion and was generally disliked amongst many. Bullying became normal for her.

She got along with Lee Kiyoung who saved her from the commotion and helped her progress her magic. She was easily able to learn and became a Wizard but hid it in order to spend more time with Kiyoung.

She killed Park Hyaeyoung during an expedition. Lee Kiyoung knew but pretended not to know. This confirmed her obsessive behavior with Kiyoung.