well, as mentioned above, she acts like a psi disrupter, effectively disrupting zerg communications with one another on a local level (specifically, if she was on a battlecruiser, the entir battlecruiser would be cut off.)  She's also naturally resistant to Psionic based attacks. I added minor telekinesis, (small objects). Since your character has that, perhaps he was the one who taught her that?  I'd also like to add aerokinesis, the ability to control air flows.  So yeah, it would make sense for Nicholai to have a past with her since they trained together. Perhaps Pyre has a nickname for him, like Lai or something?