When someone says, "I am trying to rebuild my character," it means that they recognize some aspects of their personality or behavior that they want to change or improve. They might feel that certain traits or actions in the past have been negative or detrimental to themselves or others, and they now want to work on becoming a better version of themselves.
"Rebuilding character" usually involves a conscious effort to develop positive qualities, virtues, and ethical values. It may involve self-reflection, introspection, and taking responsibility for past actions. The person might be striving to become more honest, kind, empathetic, patient, or any other positive trait they believe will contribute to their personal growth and better interactions with others.
This process can be part of personal development, self-improvement, or even a response to a significant event or realization that prompts them to make positive changes in their life. It shows a willingness to acknowledge past shortcomings and a commitment to becoming a more virtuous and respectable individual.