What is the 'z' in kana character?


What is the 'z' in kana character?

The context cartoon
image:[https://www.pixiv.net/member_illust.php?mode=manga&illust_id=66989588](https://www.pixiv.net/member_illust.php?mode=manga&illust_id=66989588)

[![the screenshot of the 'z'
character](https://i.stack.imgur.com/WXPL1.png)](https://i.stack.imgur.com/WXPL1.png)




It says:

> 「でろーーーん・・・」

There is no "z" in it.

「でろん/デロン」 is an onomatopoeia used to describe something flabby, pliable, soft,
etc. Just think of Gudetama.

Synonymous onomatopoeias would be 「グニャグニャ」、「グネグネ」, etc.

