[quote=@Savato]Oh and how strong is her air stuff now?
[/quote]

I've tabbed it at about a Level 3, though it depends on how recently she's used the Level Upper. So she can create jets of air where she touches, with some ability to control when they go off and the power of it, but not as strong as the stunts a Level 5 could pull. It is possible that the Level Upper could make her stronger though if she tries. 

[quote=@thewizardguy]
Is this alternate universe perhaps based on the visual novel?
[/quote]

I'm going to assume not, since I didn't think the early Scientific Railgun stuff was in the light novels. So, as far as I'm aware, a complete invention of my own.