Biography
The Grandmother of Yoon Bum, the Main Character of Killing Stalking. She is a Minor Character, only featured in Bum's flashbacks.
Without Bum and his Uncle at home, she was transferred to a Nursing Home.
Appearance
She is an elderly woman with grey hair.
Personality
Though cruel at times, she's kinder than her son, but passive. Due to her age, she can only watch her son torment Bum, but she is shown to try to defend him when things go too far, however, she once told Bum to die like a dog and guilt tripped him after Bum came from the sauna, despite knowing how abusive her son is towards Bum.
Unknown whether intentionally or not, she told Bum to sleep in his uncle's room one day because his uncle apparently wouldn't be coming home that night which turned out to be a lie since he came home, went to his room and abused Bum with a belt, then raped him.
It is possible that she set Bum up. The night that the uncle initially raped Bum, she likely heard what was going on and decided she didn't want it to occur in her space, which is why she sent Bum to sleep in the uncle's room the next night. The fact that the uncle walked in his room and spoke about Bum hiding at the sauna makes it highly likely that she reported the incident to the uncle and told him that Bum would be in his room. The Author admitting that the grandma was alive at the end of the series means that the grandma was there for years of sexual abuse against Bum and never did anything to stop it, this shows that at the point when the abuse became worse and the rape began, that she rather have her son keep abusing Bum than her son abusing her.