Answer: John
Step-by-step explanation:
Father John is a Franciscan friar and a friend of father Lawrence. Father Lawrence trusts John so much that he sends him to Mantua to deliver an important message for Romeo. John is supposed to let Romeo know that Juliet´s death had been staged so they could be together. However, before reaching his destination, father John is held up in a quarantined house, so Romeo never gets the message.