In Hindu mythology, the creature known to have multiple heads and arms is Ravana, the demon king of Lanka. He is depicted as having ten heads, representing his vast knowledge and multifaceted nature as both a scholar and a warrior. Ravana's character embodies the complexities of good and evil, showcasing how excessive pride and power can lead to downfall. His conflicts with the hero Rama in the Ramayana illustrate themes of righteousness and the eternal struggle between good and evil, making him an enduring figure in Indian mythology.