Narasimha Avatar is the Half-Man Half-Lion Incarnation of Sri Hari Vishnu. The story of Narasimha Avatar is associated with Vishnu’s incarnation as the boar or Varaha. To uphold dharma and save the Vedas, Varaha had killed the brother of demon Hiranyakashipu.
Narasimha, the fourth incarnation of god Vishnu, is half-lion half-human. This incarnation is to to alleviate the sufferings of devotees symbolizing fight against evil and tyranny. Lord Narayana is considered to be the origin of the other transcendental forms of God. From Narayana, Vasudeva is manifest, and from Vasudeva, Sankarsana is manifest (Agni-purana 48.13). And according to the scriptures, Lord Narasimha is an expansion (amsha) of Sankarsana.Lord Narsimha Himself is recognized in the scriptures by a variety of forms, distinguished by the arrangements of weapons in the hands, His different postures, or other subtle distinctions.