[General] How about her/she?

[Silverobama]

Hi.

Which question is correct?

How about her?
How about she?

Context: I was talking with two of my students:Rachel and Yuki. They are good friends. I asked Rachel a question first and I asked Rachel her opinion about Yuki:

I think “How about her?” is natural and grammatical.

 

[Rover_KE]

Following the preposition 'about', only 'her' is grammatical.

 

[Tdol]

I think “How about her?” is natural and grammatical.

The other is neither.

 

[Silverobama]

The other is neither.

What did you mean by this, Tdol?

Do you mean that "How about her" is also not grammatical and natural? But Rover said it's grammatical.

Or, how should I ask the question?

How about your friend Rachel?

Will this bold sound better?

 

[Glizdka]

The other is neither.

Not a teacher
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The other sentence ("How about she?") is neither natural nor grammatical.
[It's not natural, and it's not grammatical]

 

[Rover_KE]

Or, how should I ask the question?

How about your friend Rachel?

Will this bold sound better?

It's fine, but so is 'How about her?'