On November 6, HeeChul went live on YouTube to celebrate Super Junior's 14th debut anniversary with fans.
The cat moved about back and forth where HeeChul was for a bit, then jumped up to the computer desk and moved to another area of the room.
It was only seen for several seconds, but it was enough for fans to notice that the cat was the rare Sphynx cat, which Sulli had.
As HeeChul and Sulli were very close friends, they started thinking that HeeChul chose to take care of her cat from now on.
Later on, fans asked HeeChul about the cat, but he responded, "It's a secret...."
They assumed he did not want to say anything about it, because it still is not be an easy topic for him to talk about, considering that Sulli passed away just over two weeks ago.
After a thorough investigation, the police concluded that she took her own life.
(Credit= '김희철 KimHeeChul' YouTube, 'jelly_jilli' Instagram, Online Community)