Rule of Criminal Procedure 15

See Stormwind Rules of Criminal Procedure.

A. Notice of Proceedings.
The government must use its best efforts to give the victim reasonable, accurate, and timely notice of any public court proceeding involving the crime.

B. Attending the Proceeding.
The court must not exclude a victim from a public court proceeding involving the crime, unless the court determines by clear and convincing evidence that the victim’s testimony would be materially altered if the victim heard other testimony at that proceeding. In determining whether to exclude a victim, the court must make every effort to permit the fullest attendance possible by the victim and must consider reasonable alternatives to exclusion. The reasons for any exclusion must be clearly stated on the record.

C. Right to Be Heard on Release, a Plea, or Sentencing.
The court must permit a victim to be reasonably heard at any public proceeding in the district court concerning release, plea, or sentencing involving the crime.

Commentary
In all this, we sometimes forget to take into consideration the person who willingly allows this entire case to go forward: the victim. They had to let your character interact, and commit an act that breaks the law against them. (Don't forget to thank them.)

So, this rule is in place to make sure that they get a part in the RP that follows. IRL, it's to put a face to the crime, so to speak--to let the judge and jury see the consequences of the defendant's allegedly bad acts--which is a principle we would logically follow here as well.

Very often, the victim will be one of the prosecution's witnesses, so it wouldn't necessarily apply, but if for some reason they choose not to testify, they can still show up and look sad and put-upon.