[Trax]

Spoiler:

That's what I was thinking actually. Just by herself it won't do her much good, she can't defend herself physically (as demonstrated in the 2nd episode). It's still somewhat of a defensive 'power' though, I wonder if it will be interesting enough. If there are different factions within the school having some kind of power struggle, she would become a hot commodity though.

Oh and I didn't really think about it before, but nullification would indeed be better than simple immunity which was the original impression of Mikan's alice.