Shiva can three identities that I know of: 1. A blue god with up to five faces, four arms and three eyes. That’s the Shiva in the painting in my front hall.
2. A sadhu (ascetic holy man), such as this one.
3. A linga (penis-like smooth metal statue) representing… a phallus.
Shiva has a consort, Shakti, the goddess of creative energy.