Board Thread:Theories and Speculation/@comment-36342497-20180726162715/@comment-6036561-20180726181429

First of all, let's say this: we all know Mud Release is not manga canon, but I agree that it may be possible that it will be "officially" introduced in Boruto.

Second, let me begin by debating your second point:

The reason why she never displays it is because she desperately wants to marry someone. What we also know is that Mud Release user tend to be really dirty. Which makes her think that when she uses it she becomes dirty and no one will marry her.

Honestly, I don't see Mei making a problem out of this. She is a kunoichi and a kage, I would find reeeeally out of character for a woman like that to be concerned about "being dirty"... it's, like, part of her job. Now, for the second point:

Mei possesses three affinities (Fire, Earth & Water) Fire + Earth = Lava Fire + Water = Boil

So first I believed since she has no relation to the senju its simply impossible for her to acquire wood release, but now that mud is an option it makes sense for her to have it. Obviously because Water and Earth make Mud.

First of all, she said herself this: "I can user Fire, Water and Earth. So I have two Kekkai Genkai". And I don't think that, while fighting Sasuke, she would lie just for the sake of "saving her chances to get married".

Second, it all comes down to how the Kekkai Genkai works, and this is something we basically know nothing about. My guess (and I want to highlight that this is my guess, so I have no proof that I'm right) is that the elemental affinity/kekkai genkai works as follow:

Normally people have affinity to one element, but learn how to use others. It's the case of Sasuke, who has affinity to Lightning but can use also Fire.

Sometime a person with two innate affinities is born. In that case we have an advanced nature comprised of the mix of those two elemental affinities. In this case, however, the "quality" of the new element depends from one thing: the "main" elemental affinity. Let's take for example Lava Release itself. Putting Mei Aside we have four "named" character who can use Lava Release: Dodai, Roshi, Kurotsuchi and the guy from Gaara Hiden. In this case, let's say (for the sake of the explaination) that a ninja has "100 elemental affinities point". The guy from the novel, who uses Lava Release in the form of melting flames, has 95 fire and 5 earth, Dodai has 50-50, Roshi 25-75 and Kurotsuchi 90-10: so, the more "fire affinity" a character has, the more "melted" will be its Lava Release.

Then there's Mei, that is the only character - as far as I remember - to have two advanced elements. The point here is the same as the previous case, that is: she has three elemental affinities, but one of them is her main element. In that case, she may have two advanced natures with her main element as the basis. This could be hinted by the fact that her Lava Release is the more liquid among the canon one (so, more Fire than Earth) and that her Boil Release is acid (so "burning") while Han/Kokuo's is more "steam power"

However, this is only a guess, or we could say a "fanfiction", and as I said I have no concrete proof about whether I'm right or not