She spends so much time on her outward appearance. There is never a hair out of place. Her makeup is perfect and her clothes are stylish and match to perfection. And I won’t even mention her jewelry here.
This outward beauty cannot disguise her ugly soul. There is no need to take a hard look when you see her. The scowl says it all. And, when she shows her teeth and tries to smile, the demon appears.
In her case beauty is not even skin deep.