DRAMATIS PERSONAE
CHORUS
HENRY V
DUKE OF GLOUCESTER – Henry's brother
DUKE OF BEDFORD – Henry's brother
DUKE OF CLARENCE – Henry's brother
DUKE OF EXETER – Henry's uncle
Humphrey, Duke of Gloucester was the youngest son of  Henry IV.  He has a small part in  2 Henry IV ,  but in Shakespeare’s first tetralogy (set later in history, but written and performed earlier than this second tetralogy) he has a major role, acting as protector of England in  2 Henry VI  and  3 Henry VI . 
 
 Humphrey, Duke of Gloucester in a 15th century drawing. Image via  Wikipedia Commons.
Henry V Characters of the Play