[quote=@SamaraJayne96]
[@Pilatus]
Oops... I did not see that rule. I apologise.
That puts a damper on a lot of concepts I had in mind...
I'm not sure then.
[/quote]

I have two sisters as charceters. To context, you can interact with your second charecter and visa versa. Sometimes same place, sometimes different locations in my case for example. 

However that is not the detriment of interacting with others and engaging with the wider story. You cannot solely interact with yourself, if your interacting with others and they happen to be at same event and interacting with there twin at same time, that's fine. 

The problem only comes if they are only interacting internally and not externally. The rule is there to prevent charceters existing in there own created bubbles. You got to venture outside and take a few risks. 

To sum it up. 
Your fine long as your willing and interacting with others when possible and taking advantage of external opertunities that come your way. You can internally, just remember your part of a wider world too.