Originally Posted by Shinhwa
It would make sense, as if the whole world would go against Touma, that means their memories and such would be changed, but let's say Mental Out cannot be affected by other memory changing ability, or Misaki had a back-up memory or defense against other memory/mind affecting technique. If this happens, then it would make sense.
But knowing Kamachi, if the "world goes against Touma" were to happen, he would put Index and Mikoto to help Touma. But it really would be more interesting if they were to attack him or something XP
Would be interesting if he pulled that out of no where. Nice surprise where the cameo starts to become relevant in the main story now that Daihaiseisai is ending.