What I find interesting is that in one chapter we can see already how much of an impact Ruri made on Mikoto. Not only the clothing but the mannerisms, how she carries her bag, winks while looking at people, chaser. However was this a natural emulation or did something happen that Mikoto took on these traits? It seems unusual that she would change here mannerisms to this extent simply from being friends/looking up to. Also want to know is this a 3rd year or 2nd year girl???
Also curious as to the ranking, yes they stated it's by how useful they are but in the light novels they clearly use the rank as by strength, Gunha may be an exception there but overall there are plenty of LT references to the characters rank how Mikoto is the #3. Did note they didn't call her the railgun or mention any sort of rank here, did the rankings happen later? Did they change over time, or did Mikoto get strong over the course of her first year?
What happened from first year where everyone ridiculed her to becoming the Railgun Misaka-sama Ace? I hardly think she would have been called the respected Ace without some power to back that up.
Personally i'm okay sans-touma he gets enough attention and hero worship in his own story(s) let Mikoto be the hero/focus of her story.