Who was the first protagonist of Tana Bhagat movement?

The Tana Bhagat Movement (1914 - 1920) was seen as a part of the birsa movement. Jatra Bhagat and Sibu Bhagat were the movement's major leaders. The tribes were dissatisfied with the British's ruthless and upbeat attitude. Apart from that, they were harassed by the police and zamindars.