Answer:
According to the second definition of nihilism, which refers to a rejection of all religious and moral principles, none of the characters in Othello can be described as nihilistic. The play is set in a Christian society, and the characters are all guided by their own moral and religious beliefs, even if these beliefs are flawed or contradictory.
As for characters with an obsession with one thing, the most obvious example is Othello himself. He is obsessed with the idea that his wife Desdemona has been unfaithful to him, and this obsession drives much of the plot of the play. Othello is unable to see anything else but his jealousy and is consumed by it, leading to his tragic downfall.
Another character who has an obsession with one thing is Iago. He is obsessed with revenge and is willing to manipulate and deceive everyone around him to achieve his goal. Iago's obsession with revenge is so strong that he is willing to destroy the lives of innocent people, including Cassio and Desdemona, in pursuit of his goal.
Step-by-step explanation: