"Where is she?"

Translation: Onde ela está?

[FarrelDeSo]

What's wrong with onde fica ela?

[Sprinkled]

Take a look at this thread: https://www.duolingo.com/comment/2233756
"Estar - indicates where the object is at this moment
Ficar - indicates where the object belongs to/is used to be"
Hope this helps!

[rodrigo279334]

Because "Fica" here would sound like "stays" and that would means that she is always there like something with no skills to leave a place

[bendespain]

Why not just onde esta?

[ptackova]

Why I can't say "Cadê ela?"

[Paulenrique]

That's right too, and informal...