How are Friar Lawrence and the Nurse different?I need a personality trait of Friar Lawrence that contrasts with a trait of the Nurse. The Friar is...

In Romeo and Juliet, both the Nurse
and Friar Lawrence are stock characters.  Both are Aides
and Surrogate Parents who help their respective children. 
Friar Lawrence is a magical or Supernatural Aide, while the
Nurse is a Buffoon, comic relief, a baudy low-comedy stock
character who lightens the tragic mood.

Both characters are
naive, as naive as the two young lovers.  In fact, Friar Lawrence really messes things
up for them both, so maybe he's not so good at being a surrogate father (that's why he's
a priest).  So, I wouldn't necessarily call him knowledgeable.  He's rather
irresponsible.

The Nurse is not ignorant.  I think she's
funny and sweet.  But, after Romeo kills Tybalt, she betrays Juliet.  She says Juliet
should marry Paris, even after she's already married to Romeo.  What's that all about? 
In this way, she's not as faithful to her surrogate daughter as Friar Lawrence is to
Romeo.  At least Friar Lawrence is committed to really messing things up.  The Nurse
bails on Juliet about half-way through the play.