So I have a Class called Character which represents all the player, his companions, and all enemies. This class does a lot of things including performing actions upon other characters, and upon the environment, and so on.
I'm about to start work on a battle system for this RPG, and there will be the player controlled (and enemy controlled) units which will have a location on the screen, and a delay since their last action, and a ton of other properties and methods that apply entirely to the battle. But, this thing will also be associated in a one-to-one relationship with a Character which exists separate from a battle. It will need to access that characters stats for it's battle actions as well as some of it's methods.
So the root of my question is, is it better to create a new "Unit" class, which references the character it's associated with, or should I just expand upon the existing Character class with functions and properties that relate only to a battle? If it matters I'm writing this in C#.