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Saitama. is AlexCr. on 2nd acc. You can check his IP. This user boosted his friends and his self before. Here are a few examples.
http://forum.curvefever.com/content/kisura-boosting-teamrank (this one is new)
In this report we can see Alex boosts Kisura too, on his 2nd acc Schizophrenia. Like he did in the previous matchlinks for nina.
Nina knew Alex was playing on Saitama. and still chose to play with him to boost herself +34. Usually +34 wouldn't be such a big rank, but it is when you're almost 1.9k.