Tenten is going to be relevant, at least I think so. I was rereading some of the latest chapters I noticed this:
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Madara spiting out the rikoudos ninja tools and:
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Tenten realizing what they are and since she's a weapons expert, she might find a way to use them against Madara.
And this page furthermore confirmed my suspicions:
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Tenten wanted to check something and that HAS to be about the rikoudos ninja tools.
