Data object and editor object design pattern

Not sure how to ask this question but I'm looking for a clean way to solve a problem for a project. I'm trying create a class library that will allow someone to create a randomized character for a game and use the data for a web app. I have a CharacterModel class that has all the needed data publicly exposed, however I need a way to edit this information without making the setters publicly available. Also, if I have multiple characters in the future, how do I get the editor to effect specific objects? Is there a design pattern for this type of problem?