The word 'black' symbolises an African man. The word 'hermit' means someone who lives in solitude (alone) especially for religious purposes.
Remi tells Jane that he has been a Hermit for long. He ran away from his village to the city to escape from the village's bondage. He was forced to marry Thoni, a woman he believed never loved him.
Thus, Remi is the black hermit. He thought by running away from the village to the city to live a solitude life (not live in the village), he will find meaning of his life. Jane told Remi when they met, Remi looked like someone who was bring haunted by something.
Remi was haunted by his village. He never responded to his mother's letters because he didn't want to associate with her or the villagers.
After he was approached by the elders and pastor, he knew where his life was heading to. He realized what he was meant to be.
An African (Kenyan), Remi had run away to the city to live a solitary life to find meaning of his life and not to associate himself with the village. He wanted to live his own life in the city, not influenced by his village.