Karin can see through White Zetsu's transformations.

[Beans2]

All she has to do is ask "are you an imposter" and when Zetsu answers "no" she will know he's lying.

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[Sojiro]

Yeah, I guess that would work.

 

[Made in Heaven]

Too bad she was useless in actually helping to stop them

 

[Jon Snow.]

Lot of good that'll do her since she's about to become one of them.

 

[Young Thug]

Lot of good that'll do her since she's about to become one of them.

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[Xlad]

Lot of good that'll do her since she's about to become one of them.

Comment of the day.

 

[max911]

nope. she is a sensor type. Once zetsu copies your chakra, no sensor can distinguish between zetsu and the real deal.

Naruto senses them with their hate, thats why xan sense them