Cirnami Rei?

Pilot of Eva unit ⑨.

Now there's an unusual cross-over for you.

EMAERGENCY!

Cirno is 9 frames short of an AT Field.

fits well, since emergency is spelled "emaergency"

Removing this from the pool on the grounds that this is hardly an unlikely crossover (though it certainly is an amusing one) - there are at least three other pictures of a Rei and/or Lilith and Cirno crossover within danbooru alone and three pages of crossover images for the two series as a whole, to say nothing of the amount not uploaded here.

Unit 0⑨