Tybolt- Tybolt is more or less hateful than rebellious, he despises the montages’ which leads to fighting, arguments and quarrels constantly. While it may look like he shows signs of a personal psychological rebellion he's actually just a really terrible hateful person.
Romeo- While in the first few acts of the play Romeo seems docile later he shows that he does have many symptoms of an adolescent rebellion. Staying out late, drinking, going to and crashing parties, fighting and running away. It appears that Romeo may be going through Late Adolescent Rebellion, while his new found love for Juliet pushes him even further.
Juliet-I believe personally that Juliet was not rebelling against her family in anyway. She was always obedient and loving the reason she did everything like hide Romeo and pretend to kill herself so she could run away with him was just her being in love with Romeo.
Mercutio- By all means Mercutio is a responsive individual and is by no means "Acting out" against his family. While Mercutio and his companion Benvolio lead Romeo into his predicament with Juliet, it was simply by accident. Also Mercutio attempts to warn Romeo against pursuing Juliet as he knows it will not end well for either family.
Benvolio- Benvolio is by far the most mild mannered of Romeo's companions, he is not very quarrelsome and does everything he can to help Romeo and the Montages, he is known as the well wisher and originally nudges Romeo to the party to meet other girls. Where he meets Juliet, he is often known as a peace keeper.