Quote Originally Posted by Ryllharu View Post
Index acts like a child around Touma, but understands when things get serious and changes her tone. Mikoto acts like a child around Touma, and responds like a child to everything that happens around her. Kuroko has called her out on it a number of times.
Well considering she's in middle school that would make her 13-14 maybe? Not sure how they're divided in Japan so just guessing. So acting like a child seems perfectly normal and she has a lack of information (Don't remember how much she heard from the Aztec guy nor what he said other than asking Touma to protect Mikoto) while Index might not be fully informed of everything but has more of a grasp of the situation than Mikoto does. While Index may not have much of a life like Mikoto it's also pretty understandable considering her situation and the all those memory wipes she's been given. So Touma is basically everything she has which makes her frustration understandable. And going with the whole arguments with the church if she got a life in the Academy City the churches could see her as more of a threat considering she's integrating with the enemy and may therefor join them. Though I guess that's already happened considering Toumas faction and all.

Anyway back to Mikoto don't see it as her thinking that he's underestimating her considering the same things happened in reverse in her arc where she tried to do everything herself and he got himself involved. Looking at things I'd say it's somewhat similar that she knows somethings up and that he's trying to fix everything by himself while she wants to help him out she just doesn't know how. We've seen how much she despise seeing the people she knows getting hurt and what she does if she has the information to find them, so to me it's the same situation just that she's doesn't know enough to go blasting people away. Being left outside the loop can make people do weird things after all more so considering her age. Though it's nothing but a theory.