The stepsister of the deceased student Tae-yeon, she suffers from nightmares and bullying. Revealed as a past bystander in the study group's crimes, she is chained to Jung-bum in the pool but is miraculously saved by Tae-yeon's ghost and revived by Kwan-woo.
Eun-su operates within the same school environment as Se-hee, initially appearing as a teacher while secretly manipulating the camp.
Se-hee is the biological stepsister of the murdered student Tae-yeon, carrying guilt over her past actions.
Kwan-woo prioritizes Se-hee's safety, returning to the dangerous pool area to save her.
Na-rae coordinates with Kwan-woo to retrieve Se-hee from the burning school.
Both were part of the same toxic study group where Se-hee was marginalized and witnessed the crime.
Explore the full interactive character relationship map of Death Bell 2