Rahula is one of the principle Guardians of the Dzogchen teachings.
Generally, in Buddhist depictions Rahula is portrayed with the lower body of a coiled serpent spirit (Naga) and the upper body with four arms, nine heads, adorned with a thousand eyes. In the middle of the stomach is one large wrathful face. The face in the stomach, belly, is actually the face and head of Rahula. The nine stacked heads depicted above are the nine planets that Rahula has eclipsed, or rather literally swallowed, eaten and now symbolically appear on top of his own face and insatiable mouth. At the crown of the stack of all the heads is the head of a black raven. (Source: Himalayan Art Resources – https://www.himalayanart.org/)