What is an example of adversary in Romeo and Juliet?

Tybalt is an example of an adversary in Romeo and Juliet. He is a member of the Capulet family and is Juliet's cousin. Tybalt is a skilled swordsman and is quick to anger. He is also very loyal to his family and is willing to fight to protect their honor. Tybalt is a major obstacle to Romeo and Juliet's relationship, as he is determined to keep them apart.