The soliloquies and the character foils plays the role of revealing the personalities of characters within the play. A foil is a character that helps in highlighting the qualities present in a character by showing their contrasting qualities and the character traits. It helps in determining what the character in the play is and not about what he is not. It helps in the discussion of the characters and gives the readers idea of the contribution of these characters in the plot construction.
The Relative Clause is “who are five in number”. It is a type of dependant clause (it need the main clause in order to convey its meaning properly) that has the same function of an adjective; that is to say, it modifies a noun “friends”.