Characters in Romeo and Juliet
Friar John We know very little of Friar John's personality.  Certainly he is willing to help Friar Lawrence so we might say that he is obedient or kind.  He is caught up in a quarantine so we know that his inability to deliver the letter wasn't because of cowardice or bad intent.  All we can say for sure is that Friar John tries to help Friar Lawrence.  He has no idea what is in that letter.  We know that he does make the attempt but that is about all we know.  It is difficult to draw conclusions about Friar John's personality from our limited contact with him in the story.