In Shakespeare's Macbeth, Macbeth, Lady Macbeth, and Banquo are faced with internal conflicts.
Macbeth is ambitious and wants the throne, but feels guilty about killing Duncan to get it. He worries about his eternal salvation, about how humbly Duncan ruled, and about how his reputation has greatly increased lately and he doesn't want to risk losing that.
Lady Macbeth feels guilty for her part in Duncan's murder. She is a driving force behind it. This leads to the murders of Banquo and Macduff's family, though she doesn't play a direct part in those. This guilt leads to her mental breakdown and suicide.
Banquo strongly suspects Macbeth of treachery. Yet, he has no proof and he is Macbeth's friend. He is also conflicted because his heirs were predicted to be kings, and he treasures the thought of that happening. He, however, behaves nobly and does not let ambition lead to treachery as Macbeth does.
In Shakespeare’s play Macbeth I would say that Lady Macbeth has inner conflict. At first she is the one who convinces her husband to go ahead and kill the king so that he can take the throne sooner. She devises a plan for the king's murder and to drug the guards. However, later she begins to feel overwhelmed by her own vices and eventually becomes mentally deranged.
Duncan is a very orderly King. He serves his country well but he is a humble king. He finds failure in his contributions when he has actually been a good and noble King.
Macbeth has inner conflict as he is uncertain if he can carry out his wife's idea to murder Duncan so he can become king. After the witches tell him that he will be king he wonders and experiences self doubt. He is weak and easily swayed by his wife.
Macbeth contemplates the Afterlife and considers where Duncan will go once he has killed him. He becomes haunted by he thought that what he ahs done can also be done to him and hat by his actions he has now prevented himself from every having an easy rest.