[MrTerrorist]

Originally Posted by ssc2good

Spoiler for chapter 7 and light novel vol 1:

It's been a while since I've seen volume 1 of the light novels, but if I remember correctly, I think she did mention her clones to Touma during their meeting on the bridge. Their conversation was longer in the novel and they were talking about the "goals" of the Academy City or something. I don't remember the actual conversation in the light novel, but I don't think her mentioning it was that out of place as compared to their conversation in the railgun manga.
I can understand the Index manga and anime dropping that part of the conversation, so the viewers could be more surprised when they reach the volume 3 arc.

Originally Posted by serenade_beta

That's right. The Sisters were mentioned in the novel at that scene, but the manga/etc. were the ones to take it out.
The anime seems to be making the whole thing a surprise, but they secretly put in that blimp during episode 6... And then watchers are going to be like "Ohh! That was..."...

Overall, it doesn't really matter if there are inconsistencies.
1. Heck, the original novel has inconsistencies by itself. How much does more inconsistencies hurt? <--not really serious
2. This was supposed to be some spin-off manga after all, so it is not like the manga-ka cares if her manga doesn't go by the same events as the novel.

I hope Saten gets a voiced role in the anime...

Spoiler for Did some fact checking:

Okay i went to light novel thread and read the prologue chapter. It's true and it turns out Mikoto did mention her 'sisters' to Touma. God, i musta skipped that while i was reading it before. I Got to remember things i read carefully next time.