Here are two adjectives for each character, with brief explanations.
Abigail is guileful and underhand.
Abigail is not a likeable character, but she is the product of childhood trauma, followed by living as a poor relation in the house of Reverend Parris. These misfortunes, together with the repressive atmosphere of Salem, have led her to develop habits of concealment and dishonesty.
Reverend Parris is paranoid and avaricious.
The Reverend Parris is constantly worrying about his unpopularity in the parish and trying to improve his status and salary.
Tituba is deracinated and powerless.
Tituba has been taken out of a society that makes sense to her and placed in one where her only function is to serve others. She has no independent existence and is only addressed at all about her relations with Betty, Abigail or the Reverend Parris (or, of course, the Devil).
Proctor is independent and impetuous.
Proctor develops throughout the play and there are adjectives that would only apply to him at certain points. He always follows his own course, though, and his quick, impetuous temper remains constant.
Putnam is purse-proud and litigious.
Purse-proud is an uncommon word now (Merriam-Webster gives its first use as 1681, so it would have been a brand new word to the people of Salem). However, its meaning, "looking down on others less wealthy than oneself," perfectly captures Putnam's attitude. He is also nearly as addicted to court actions as Giles Corey.
Goody Nurse is pious and altruistic.
Rebecca is one of the few Puritans who gives the impression of genuinely believing in God and caring about her fellow people.
Mary Warren is subservient and arrogant.
I have tried to find a word which means "subservient when weak but arrogant once in a position of strength." In the absence of such a term, however, I have used both terms for Mary Warren, a weak character who becomes self-important when the court gives her a little power.
Reverend Hale is learned and thoughtful.
Even more than Mary Warren, the Reverend Hale is a dynamic character. Unlike the other educated characters however (Parris, Danforth and Hathorne, for instance), he thinks for himself and changes his mind based on reasoning.