Answer:
The novel: Don Quixote by Miguel de Cervantes
Character: Sancho Panza
Explanation:
Don Quixote is a novel based on a character (Don Quixote) that loves medieval novels and one day in his craziness he decides to start acting if he were in one of his novels.
Sancho Panza, whom is his confidant during the novel is with him in all the adventures, helping him to not die by trying to put reality on his sight, however, Don Quixote always gets involved in conflicts and fights.
The main quality of Sancho is the hability he has on controlling, as he can, Don Quixote and even though he can´t see reality as he does it, he tries to go along with him and his madness.