The diamond is attached to the cat's collar.
Why is it angry?
It is too flat and sad
It is not inviting enought
It is perfect now
But she won't let you take it. She is angry.
Look at the cat.
Everyone is angry if they are sleepy.
Maybe she would want to sleep on a comfy bed.
She needs a comfy, fluffy pillow.. I mean bed.
There is a pillow upstairs. That should do it.
The pillow needs to be fluffier
Make it more inviting for the cat.
Give it to the cat. She will sleep on it. Take the diamond from the cat's collar. Use the diamond on the safe to open one of the locks.