Why is lesserafim called the post-80s sister?

Lesserafim was called Sister 80 because she bullied her classmates at school. Lai serafim was originally named Kim. It's a rumor from campus violence, and 80 is a homophonic word for bullying, so it's called 80 sisters. On May 19, 2009, the victims of the Jin campus riots claimed that the Jin campus riots were true and the notification was true. I was moved by Kim's campus violence, but I was said to be the wrong side and suffered a second injury. Now I'm trying to make an extreme choice. HYBE officials responded to this, claiming that these remarks are maliciously spreading false facts and will take legal measures to solve them, calling on everyone not to listen to one-sided content. What is the specific situation, we need to wait for further investigation to have a result. Kim is a member of the Korean women's group LESSERAFIM.