Yuuto frowned as he heard the news. 5 Jinchyuriki and an invasion plan already. "An attack on this village... to accuse Konoha of aggression is one thing, to act as the aggressor is another thing entirely." If Konoha was the one being attacked, his sense of justice would demand he help her defend her own people. After all, what was rejection of the republic aside from maintaining a nation's right to sovereignty? 

Before he allowed himself to be mired up in philosophy, however, he had another matter to consider. "what about you?" he asked Tesla. "What exactly are you? You claim to have deep information sources and yet from the intent you just confessed to you are obviously no ninja of konoha. Had you been a spy for another nation, you would definitely not have dared discuss such matters with me." He had already revealed his identity without demanding the same from her, and as such he felt that he needed to be able to trust her before revealing any more of his information if possible. 

As for sides, in the end, Yuuto figured he would probably try to remain as neutral as he could until the moment when he would be forced to defend a person who could not fight back. All that mattered by then was whether or not the coin flip of life decreed whether he would be defending a konoha or a republic shinobi... or was it? Was something else going to happen? He had heard the Samurai General's side already; perhaps he should hear from the hokage. However, he did not fancy the chances of a single ronin meeting the hokage.