I just read some curious speculation on 4ch...
What do you guys think about the level 5's being related to the seven sins?
Something like this:
1 Accelerator - Wrath
2 Kakine - Greed
3 Misaka - Pride
4 Mugino - Envy
5 Shokuhou - Lust?
6 ? - Gluttony
7
Gunha 8 Takitsubo - Sloth
Alternatively, Gunha could be Pride instead of Misaka. (And according to some doujins, Misaka could be lust
)