The prosecutor.
That depends on which country we're talking about. In some countries, a lawyer will be assigned to the defendant.
If you refering to what is the term for a person who is trying the state's case against the defendant, they are called the Prosecutor.Added: His opposite number in the courtroom, would be the Defense Attorney.
It depends if the lawyer's client is the plantiff then the opponet is the defendant. If the lawyer's client is the defendant than the opponent is the plantiff.
a defendant (ex. lawyer)
lawyer
araignment
pathos
The person a case is held against is the "Defendant". The person holding the case against them is known as the "Plaintiff".
The defendant can be kin to the lawyer, but a judge would probably have to recuse himself. Which means he can't sit in judgment because of interest or bias.
A lawsuit demand letter is generally a letter from the injured person's lawyer to the defendant or the defendant's lawyer stating the amount of money the plaintiff is suing for.
I'll consider this to be a vague question. If I had to rewrite the question, I'd put it this way: "In a court of law if a defendant is represented by his/her lawyer or attorney, then what is the opposite of the defendant's lawyer?" The answer in this case would be the prosecutor, also an attorney/lawyer, but with opposite goals.
Clarence Darrow