Steve Sande skrev:

My cat "Aeriel"' is 9 years old. From the time I got her she has been
friendly and affectionate. For the last 3 days she has been hiding.
She is not eating and does not come when called. I finally found her in
the closet and now she is under the bed. Do you have an idea what is
going on?

A cat that doesn't eat and is hiding is most likely ill.
I think you should contact a vet ASAP.

Niels Peter