Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Bunzi is sometimes depicted as a multicolored serpent that rewards those who worship her with an abundant harvest. She also said to appear in the rippling water of the river at sunset.
Beliefs
According to Kongo oral tradition, Bunzi is the daughter of Mboze, the Great Mother and wife of Kuitikuiti. Bunzi is sometimes depicted as a multicolored serpent, and rewards those who worship her with an abundant harvest. When Mboze gave birth, Bunzi was born in the form of a baby serpent. Upon seeing the child, Mboze's husband Kuitikuiti knew that she had been unfaithful to him. When he learned the biological father of Bunzi was their son Makanga, he killed Mboze for her transgression. Bunzi took on her mother's rain-bringing power. According to legend, when a rainbow appears in the sky, that is Bunzi.
The Yombe people of the Republic of the Congo refer to Bunzi as Phulu Bunzi and consider the spirit to be a male lord of the water. He is said to have devised a pact between Nzazi (the god of thunder) and Mbumba (the rainbow water serpent) to create harmony between the earth and the skies. One day while he was visiting Mbumba, his son died. Consequently, Phulu Bunzi blamed Mbumba and cut his head off.