Narasimha, one of the avatars of Vishnu, is half-man / half-lion, having a human like torso and lower body and with a lion like face and claws. He took the avatar to kill the demon king Hiranyakashipu and also to protect his devotee Prahalada. He is known as the "Great Protector" who defends and protects his devotees in times of need.
Narasimha avatar emphasises the omnipresence of God or Divinity everywhere. The avatar also demonstrates God's willingness and ability to come to the aid of His devotees at any time. Prahalada's devotion demonstrates that pure devotion is not one of birthright but of character. Prahalada although born an ausra (or demon) showed the greatest devotion and love for God, endured much pain while doing so, without losing faith.