how did shakespaere use falstaffs charcter to add to the play henry IV?

Question

also how does he use this to character to enhance the plot, other characters and themes in the play?

Answer 1

He uses Falstaff's character to show how the ideas of honour, courage, duty, etc. can be stupid ideas if not used in the proper manner. Shakespeare also has Hal (Henry) play off Falstaff so that he (Hal) grows while Falstaff does not.