post your script for possessing the two characters since that will probably be the easiest place for you to get the needed references. also post where you are creating the widget so we have a reference to that as well.
it may be as simple as having two public variables in your character, then when the widget is created you pass the variables on to set a variable in the widget, then use the variable in the widget as the needed reference. but without knowing your code / setup i cant tell you to do X.