[kuroishinigami]

Originally Posted by ReddyRedWolf

Spoiler for novel spoiler:

The Sisters would go in a coma as well. The entity created is a artificial angel much like Hyouka. Aleister replicated the process causing the Sisters and Last Order to go in a coma. The whole Level 6 was a lie. Apparently he was counting on somebody to beat Accelarator so he can spead the Sisters around the world in a bid to allow an entity into the physical world. Everything went as planned.

Spoiler for railgun manga:

Besides, level upper doesn't really work like that. Level upper only create some kind of index so a person on the network can use th ability of other person on the network. So if mikoto use level upper, other people will be able to use her ability, but the only thing she'll be able to use other than her original power is lower level ability(which won't increase her level).