I’d say the ability to change temperature at will so she could freeze something or head it up. but given her colors lowering temperature would fit her most.
Either the neck is a bit too long or the shoulders a bit too low… I cant decide. Great build otherwise, though.
From the colors, I’d guess Ice or Lightning as her elements. If you want to make one up, I’d suggest rahi control. Or, of course, she could be a Toa of Light who disguises her appearance by altering her coloration, like the Av-Matoran do.
Lightning seems like the logical choice, given that she’s blue and white. Not to mention that the decals kind of give a sort of industrial vibe, which coincides with the whole lightning thing. I dunno; that just sort of makes sense in my mind.
Also, either the feet seem to small or the legs too short.