The true, terrible secret to how Momo speaks:

[hider=DARK SECRET]
[img]http://www.anime-planet.com/images/characters/misaka_1_51735.jpg[/img]
[img]http://static.zerochan.net/Last.Order.full.1120477.jpg[/img][/hider]

I just need to decide which (yes, this is a silly character, why do you ask?), which is mostly 'which do I feel more like doing'.