The cover is Shiho.

The encrypted message part

Naruto notices the character "ta" on the toad's back. Everyone had mistaken it for "9."*

At that point, Shikamaru suggests they look among Jiraiya's novels for one which begins with "ta", when the window opens and Kakashi says "probably this one."

Shikamaru: Icha-icha tactics..."ta"!

Shiho: Alright, then, would you mind turning to page 31?

Kakashi asks what they're going to do, and Shiho tells him to read the contents. Kakashi hesitates because the passage is kinky, but he starts reading anyway when Naruto presses him to do so.

The message is "There *is* no real one."

Shikamaru anounces he's going to Tsunade.

Shiho:"Can I come too?"

Shikamaru: Thanks.

At which point Shiho smiles.

Scene changes to Pain, Konan and Madara.

Pain is told by Madara that Konoha's made him their target, but Konan replies "Pain is invincible...the Kyuubi is as good as ours."

Madara: I've made Sasuke go after the eight-tails.

Konan: Is he up to it?

Madara: I guarantee he is.

Madara vanishes.

Pain stands up.

"Konan, start preparations immediately."

From the back comes a "konan*" with black sticks protruding from her head, as well as other characters.**

"The new Pain is probably based on Konan, because it looks just like her and came out of the shadows after Pain said to her "make preparations!", so probably.