Who are the "Trimurti" and their role in Cosmic Cycle as per Hinduism

"Trimurti" is actually trinity of gods in Hinduism. They are the supreme gods and have special roles in the universe. They are the main pillars of universe. Its Creation, Preservation and Destruction are maintained by these three. Unlike other mythologies they are not king of gods but King of god Indra is a lesser one in front of them. Unlike other mythologies these three control total universe. Other gods control earthly matters. These three are beyond comparison with other lesser gods. They are Brahma, Vishnu and Shiva. 

Brahma, Vishnu and Shiva

Brahma : Brahma is the creator god. He created the universe. Everything inside the universe is created by him. He has four heads (Actually had five but that one was cut by Shiva. That's another story. Will share another time). His four heads overlook the four sides. Brahma is portrayed as an old man. All living and non living things are his children. He is like a father figure to all.

Brahma

Vishnu : Vishnu is the preserver god. He preserves the universe and its inhabitants created by Brahma. He is very powerful, most intelligent and tricky among the three gods. He saved creation many times from many catastrophes. Like in my earlier post I shared his role in great flood where he instructed Manu to build a giant boat and himself incarnated as Matsya Avatar or the giant fish which pulled the boat to safety. He had total ten Avatars or incarnations. Most famous of them were Rama of epic Ramayana and Krishna of epic Mahabharata. His role is to maintain the balance between creation and destruction. 

Vishnu

Shiva : Shiva is the destroyer. He is called as Mahadev means god of gods and sometimes Adi Dev means the ancient one. He is the most ancient. We find birth story of Vishnu and Brahma but there is no story regarding Shiva's birth. Like he was there from the beginning. Who created him nobody knows. He destroys to clear the path for new creation. He is the most noble one. He portrayed as a Man wearing tiger's hide and holding a trident. 

Shiva

In Hinduism where is beginning there is an end. Its a cosmic cycle. As the universe was created it will end but not the complete end. It will be created again and will be destroyed again. Nothing is eternal here. Birth of universe, death of universe and rebirth of universe. These three deities are the symbol of that cosmic theory. So, in Hindu mythology these three are the most powerful and the symbol of that creation cycle.