Lebo is the mentally handicapped brother of Alima the leader of Bayan. He has a stressed relationship with his sister and is allied with her enemy Selen. He appears to be mentally fine but stutters in his speech.
One outcome of the drought quest has Selen barter with Alima, resulting in Lebo becoming the new leader of Bayan. This is likely Selen using Lebo as a pawn to get Alima out of power.