My two characters are Romeo and Tybalt.
Romeo and Juliet get married, but soon after doing so, it gets complicated because of the long-standing fight between the Capulets and Montagues. Romeo tries to keep peace because Tybalt, a Capulet, is now related to him by marriage, but he feels a strong sense of revenge after Tybalt kills Mercutio. This portrays Man vs. Man because now, there is conflict between Romeo and Tybalt, because Romeo wants revenge for Tybalt killing Mercutio.