Someone asked why but the thread got deleted before I could respond. Anyway now to the answer.
Katsuyu is telepathically linked to Tsunade. She felt that Kakashi had died through Katsuyu.
Later after CST she sees the destruction of Konoha through Katsuyu.
Now since they are telepathically linked Katsuyu can break Tsunade out of genjustu like a Bijuu can with the Jin.
Another way is simply having Katsuyu on
This of course only works against regular genjustu like Sharingan genjustu. This wouldnt help against MS genjustus and such as they have to be broken through different means.
Katsuyu is telepathically linked to Tsunade. She felt that Kakashi had died through Katsuyu.
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Later after CST she sees the destruction of Konoha through Katsuyu.
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Now since they are telepathically linked Katsuyu can break Tsunade out of genjustu like a Bijuu can with the Jin.
Another way is simply having Katsuyu on
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, we know Katsuyu pours chakra into people and that would break the genjustu placed on someone like the partner method. This of course only works against regular genjustu like Sharingan genjustu. This wouldnt help against MS genjustus and such as they have to be broken through different means.