Mei deserves a 5 in ninjutsu because well, she has 2 kekkei genkai as well as usage of water, earth, and fire release techs
Lava Release
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A combination of doton and katon, Mei's lava release is a formidable offense,
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. As shown in the page above she could just spam it to cover the entire field in lava or, like she used it against Sasuke, she can
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and
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so that she can attack again. Because she was wiping lava from her mouth without harming herself it should go without saying that she's immune to it.
Boil Release
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The second of Mei's KkGs and a mix of katon and suiton. It's just like Hidden Mist Jutsu, but with... acid. It's obviously strong enough to melt susanoo which has been able to take attacks such as laser circus and the Raikage's raiga bomb.
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, which means she can control the pH levels of her mist. If she used this in an open area and cranked the pH level to the lowest levels possible it would easily make up for it not being used in a closed room. This is made even deadlier by the fact that the opponent won't realize it's acid until it's too late.
Water Release
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Since you know, she's the Mizukage, kage of a village known for their suiton, she's a master of water jutsu. Even in a dry area with no nearby water source, she can use a massive Waterspout that is capable of extinguishing even the strongest fire jutsu and then quickly use that same water to create a giant Water Dragon Bullet which is strong enough to
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. This gives her both a good offense and defense at the same time, she can also drown her opponents. mei was gonna use 2 more suiton against Madara but Kishimoto trolled her and she fell asleep and lacked the speed to perform them. She can also use
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which as demonstrated in Kakashi vs Zabuza, can easily block the opponent's vision and even give her an advantage against Sharingan users.
Fire Release
Although mei has not been shown using katon on panel, it's a part of her Lava and Boil Release and she tells Sasuke that she uses fire nature. Fire release can provide for some very destructive attacks even though she already has stuff like lava globs in her arsenal. it also gives her
immunity to Wind Release.
Earth Release
Same as above. Earth release is good for both offense and defense and mei could potentially use earth walls or mud to restrict her opponents or block. Gives her
immunity to Water Release, although Mei herself is already good at suiton.
