The character Friar Lawrence from the play 'Romeo and Juliet' has some very individual characteristics and powers. He is privy to the innermost thoughts and wishes of the young sweethearts. Even Romeo's friends are not in on this particular romantic secret - he let them in on his lovesickness for Roasaline, but this is different. The Nurse is confidante to Juliet but she is in a tricky situation (beholden to her employers and powerless to act in a way that might compromise her position.) The Friar on the other hand has power. He also has more privacy due to his situation in a more isolated role in the monastery. He uses his God-given power in accordance with his first and main priority - the prevention of a sinful union - to marry the couple.
To me, what is different about Friar Lawrence is that he is the only one in the play who does not really have a selfish goal in mind. He is trying to help everyone else instead of trying to get something for himself. So even though he messes it all up and causes everyone to die, at least he meant well.
All that Friar Lawrence wants is for the feud between the Capulets and Montagues to end. That is not a selfish motive. All the things he does are aimed towards that goal. Of all the people in the play, only he has a goal that is not mostly tied to himself.