How did Mutsu know that Nagato switched the internal and external thoughts? Is she a mind-reader?
She knows her sister
Are you even listening, Nagato?I'm so jealous!Do you have any problems with these expedition groups?Giving Kaga-chan a piggyback...Yeah... no issues with the formations.Nagato... you swapped the internal and external thoughts around.Absolutely Jealous...so,...and that's it.