Lord Shiva is one of the second highest supernatural powers or deity in this creation. He is very very powerful and controls the Might (Shakti) in this universe. He is made by the Eternal Being, the God Almighty, to destroy the evil powers and for the welfare of this creation. And for this, he has been granted many unlimited powers by the Eternal Being, the God Almighty. This deity is generally worshipped by Hindus for getting powers, siddhis, welfare or protection by evil etc.
Lord Shiva has many names like Lord Shankar, Shambhu, Bholenath, Pashupatinath, Aadinath, Aadidev, Mahadev etc.
Goddess Parvati or Durga is his power. She has many forms and worshipped by the people around the world to get their different wishes fulfilled by her. This is a religious power and sometimes very furious in forms like Kali, Tara, Chinnamasta, Dhoomavati etc. As this is a divine power and Might of Lord Shiva, she never hits on Dharma or her devotees. She obeys each and every order of Lord Shiva by heart. She respects and worship her God Lord Shiva. She never goes against him.