The former member of f(x)'s Krystal is revealed to have stayed by Sulli's wake for 3 days to show her deepest grief for the death of her friend and former bandmate.

Many of Sulli's celebrity friends in and out of the entertainment industry have left messages of grief on social media, but former bandmate Krystal has not commented online about her passing away. This has caused some debate online with some hate comments asking why Krystal is remaining silent on the issue, and one insider spoke up on Krystal's behalf.

For Korean customs and culture, family or friends mourn the deceased at a memorial altar couple days, and it seems Krystal has helped Sulli's family with the process. On October 17, it is said that Krystal stayed by Sulli's wake for the 3 days since Sulli's passing on October 14. One close friend of Krystal told media outlets, "After hearing the news about Sulli, Krystal was in deep sadness as she stood by the funeral hall for 3 days. She was there for the whole process. There are many malicious comments spreading out and it is too harsh to accept." Other bystanders also stated on the malicious comments, "It's shocking and sad."