If you read the novel carefully, you will realise that her character is irreproachable.

Answer: Option C

Irreproachable : beyond criticism; faultless.
Flawed : having or characterized by a fundamental weakness or imperfection.
Blemished : spoil the appearance or quality of (something).
Defective : imperfect or faulty.
Deformed : (of a person or part of the body) not having the normal or natural shape or form; misshapen.

Antonym of Irreproachable is Defective