pleader

One who pleads; one who presents pleas for or against a claim, allegation, etc.; technically, a lawyer who pleads a cause or argues in a court of justice (the original meaning of the term), or who drafts, prepares, or devises pleadings.

The party whose pleading is under consideration

One who pleads; one who argues for or against; an advotate.

One who draws up or forms pleas; the draughtsman of pleas or pleadings in the widest sense.

A person, such as an advocate, who pleads.

a lawyer who pleads cases in court