Who is Arjuna from The Bhagavad Gita and what is their importance?

Arjuna is a warrior Prince. He is an Indian man. The warriors and kings at the time of the story are called Kshatriya and are considered as one social class. At the start of the book he faces a terrible personal crisis. He is meant to be a leader amongst the soldiers on his side in a war, to head off into battle the very day of the story and he is overwhelmed by resistance and grief. He refuses.