Wrong question. It may be like this.
What is this?
Who is he?
"What is he?" does make sense. Here's an example:
Someone asks, "What is he?"
You answer, "He is a doctor."
But is nt used regularly
To answer this question I wrote like. I guess I am right. am I? " वह कौन है?"
"वह कौन है?" translates to "Who is he?"