He is the only character given something close to a name.

He is the only character to appear in all of the books.

He is the only character written out of the show for the second season to make a return appearance.

She loves the town, and is the only character who's not happy at the end of the play.

He is the only character to appear in all 6 series.

She is also the only character in show who always tells the truth.

He was the only cool character I ever saw growing up.

Red is the only main character who has not once mentioned her family.

The judge was the only character new to the case.

The "people" in the show are the only characters who talk.