Who is Inigo Montoya from The Princess Bride and what is their importance?

Inigo Montoya is a wiry, drunken Spaniard who readers love. Inigo is born in a small village in Spain where he lives with his father. Inigo's mother died giving birth but he does not lack for love. Inigo and his father, Domingo, have a very strong bond. Inigo worships his father and when Domingo is slaughtered by the six-fingered man, Inigo does as any good son would and seeks revenge. Avenging his father's murder becomes Inigo's sole purpose in life and for many years he does nothing but learn to fence and search for the six-fingered man.