[Miraluka]

Originally Posted by ronelm2000

Spoiler for This may be more than an opinion / speculation....but...:

Is it expected that the events in Index are also canon in Railgun? In particular, the Level Upper Arc has some pretty darn confusing canon problems that it had to be retconned in the Anime for it to work. So, is there a probability that such things will happen in Sister's Arc as well?

No, it was the whole Teresthina thing that had to be retconned not Level Upper. LU arc makes a little reference to Sisters Arc and Body Clear from future novels.