In the ninth episode of Death Note, a Shinigami, Zellogi, decides to "check out on Ryuk":
A conversation with another group of Shinigami goes like this:
-Who'd want Ryuk as a pet? He's not even cute.
-Haha, you're right.
-So, what kind of human is it? Male or female?
-Who knows. I wonder.
-I'll find out myself.
I imagined that he would go to the human world and make some appearance there, but as far as I know, he doesn't. What happened to him? What did he do?