Let me see...
Javert: A loner, who was extremely misunderstood as a kid. And no friends
Valjean: Helping others, but only when they asked. He stole bread, out of desperation, remember.
Enjolras: The most boisterous kid that ever existed in France!! "Why this? Why that?" Stop, Enjy, stop!!
Combeferre: A lot like me as a school kid!! Very studious but very quiet, almost introverted. Ready to help others when required. A definite teacher's pet 'cos of his good behaviour and extreme interest in academics
Courfeyrac: The 'cool' kid, you could say. Very easily making friends, indulging in mischief, and getting away with it! Basically, the complete opposite of 'Ferre, I imagine!
Jehan: The quiet kid who wants to be friends, but is too shy to talk to anyone
(again me!) The darling boy who would never even dream of hurting a fly...but whoa, joining Enjy's cause means a lot of inner strength & passion really existed underneath that perceived fragility.
Mme T: Why did she marry T of all people?!? 'Cos I can actually imagine her to be a decent working class girl before she got involved with him!
T: Lesser said, the better.