Rahu was a cruel Asura in Hindu myth. It ate the nectar of immortality and was subsequently beheaded by one of Vishnu's avatars.
Rahu also appears in Buddhism within the Pali Canon as a being who attacked Chandra and Suriya before being compelled to release them. The Buddha responds by enjoining Rahu into releasing them.
Rahu, or Rahula, is also the name of a demon in Tibetan Buddhism who was subjugated by Padmasambhava and became a protector of the Dzogchen teachings. In Tibet, he is called Gza.
Rahu appears in the Digital Devil Saga: Avatar Tuner series as the Atma Avatar of Mick the Slug. Mick transforms into Rahu when cornered by Serph and company at the top of Coordinate 136 after Cielo rescues Sera. During the battle, both his head and body are targetable and act independently.
His body can use Dragon Quake, a powerful earth attack that hits your entire party, and his head can use Dragon Thrash to capture one of your party members. Party members captured in such a way will be drained of HP every time their turn comes up. They can only be freed by destroying either the head or the body, otherwise your captive party member will only be released when they are drained of HP completely. His head will still fight on if you destroy the body, and vice versa.
The head, originally a folded mass, can deploy a humanoid combat form.
Digital Devil Saga: Avatar Tuner 2[]
Mick the Slug's Solar Data is encountered near the end of the game, and challenges you again as Rahu. He fights exactly the same as he did in the first, only with more HP.