Who are the dynamic and static characters in the book And Then There Were None?

And Then There Were None functions as a mystery on several levels, from the characters' initial questions about the reasons they were taken to the island, through the manner and sequence of their deaths, to the identity and motive of the killer.
As might be expected, the characters who are killed the soonest tend to be flat, as there is less time for them to develop and change—Anthony Marston, the General, the Rogerses, and Miss Brent, who cannot see any need for remorse or accept any blame for her role in her servant's death.
The mastermind and murderer also changes very little. Judge Wargrave seems to have a personality disorder that compels him to control and manipulate situations and other people. The book shows how he methodically carries out his plan.
The two characters who are drawn together and interact substantively over the course of the novel are the most dynamic. Both through their reactions to the events on the island and through their interactions in an effort to discover the murderer's identity and stop them, Vera Claythorne and Phillip Lombard undergo several changes. Vera feels increasing remorse and guilt, and must act on those feelings. Phillip, however, unwisely continues to think himself superior, so he fails to see Vera's intentions and pays with his life.