Gertrude. I suppose he may have told Hamlet not to take revenge on Gertrude because the ghost still has affection for her, or because it would be particularly evil for a son to kill his mother, or because the ghost knows that Gertrude was not privy to Claudius's murder, and the murder is what he wants revenge for. Or some combination of these.
The ghost of Hamlet's father, the former king.
Horatio
He's talking about his mother.
claudius
Hamlet is directly responsible for the deaths of five people and indirectly for another. The first person to die because of Hamlet's actions is Polonius, who Hamlet stabs in the mistaken belief that he is King Claudius. This indirectly causes Ophelia's death. Hamlet then kills, in succession, Rosencrantz, Guildenstern, Laertes and Claudius.
The ghost of Hamlet's father, the former king.
The soldiers want to tell about the ghost to scare you.
Laertes conspires with King Claudius
Horatio
He's talking about his mother.
The Ghost wears something different in every production. At least in the first scene, the text suggests that he should be wearing a suit of armour because of Horatio's description of the ghost to Hamlet, that he was armed "from cap a pe", which means from head to foot, and that he wore his beaver (his visor) up. Notwithstanding this, a number of productions do not have the ghost accoutred in this manner, either because suits of armour are expensive and hard to get, or they are clumsy and make it hard for the actor to act, or they don't match the period the director has chosen or any combination of the above.
Prince Hamlet realizes that it was a skull of a jester whom Prince Hamlet once knew he was Yorick
King Hamlet isn't. King Hamlet was. In the play Hamlet, King Hamlet was the previous king of Denmark and father to Prince Hamlet after whom the play is named. At the time the play starts. King Hamlet is already dead. However, his ghost makes an appearance in Act 1 Scene 1 and in three scenes thereafter.
claudius
Laertes tries to kill Hamlet and is successful.
In Macbeth, the king's cousin gets talked into killing the king by his wife, who is all excited about some prophecies made by some witches that Macbeth would be king at some future time. The king's son gets blamed for the murder and runs away. However, being king and queen does not make either of the Macbeths happy and in fact turns Macbeth into a paranoid mass-murderer whom everyone abandons as the kingdom falls into ruin. The son of the king then leaves his life of hakuna matata and returns to claim the throne.In Hamlet, Hamlet, the son of the late king of the same name is told by the ghost of his father that his uncle and stepfather Claudius obtained the throne by murder. Hamlet, who is forced to remain in his uncle's court while trying to plot his revenge, tests the ghost's statement by staging a play very similar to the murder, which confirms the king's guilt but also tips the king off to what Hamlet knows. Hamlet kills the king's counsellor, believing him to be the king, which estranges Hamlet from his girlfriend Ophelia, daughter of the counsellor. The king tries to get rid of Hamlet by sending him to England to be killed, but Hamlet never gets to England and returns. His girlfriend has meanwhile gone insane and died. Hamlet gets into a fight with Ophelia's brother, who has plotted with the king to kill Hamlet, but everything goes horribly wrong and Ophelia's brother dies, Hamlet's mother is accidentally poisoned, Hamlet is fatally wounded and kills the king before he dies.
Laertes is the son of Polonius and brother to Ophelia whom Hamlet loves. King Claudius poisons Laertes's sword with the intent to kill Hamlet in the tragedy play by Shakespeare titled Hamlet.