So, the main object is Fighter_Control, it's in a container with a Dictionary. And you also have Fighter_Images family, which should be linked with each Fighter_Control. Is this correct?
Is the Control_AI variable unique for each Fighter_Control instance? If it is, then it should be enough to associate Fighter_Images instances with their corresponding Fighter_Control, and to pick them in any events.
But from your screenshot it looks like Control_AI is not unique, for example can it be -1 for both Fighter_Control?
If Control_AI is not unique, or if its value can change during the game, then you should add another instance variable Fighter_Control_UID on the Fighter_Images family, and use it to link images with the control instance.