Oh. I missed "and her head exploding with transformation". Transformation into what??
That's the question, isn't it. I had to go check on earliest record gamma activity after that, and it is years after Clemson McClain's first activity, soooo....
Indeed. (However, she's not described as being overly slim, or needing a few thousand calories a day... is there a pre-Beta thing, I wonder?)
There is definitely something, ahem, anomalous about the description of what's going on in Frost's head as she kills her father: 'exploding with transformation' and 'this is too good. This is too bright'. And then again later, while she's talking to Reyes at the climax of the siege 'that still place, that quiet place in her head emerged'. The PTB like to mess with our heads, but so often it turns out years down the track that there is a real purpose to it, and that means you have to wonder whether someone has messed with Frost's head as well as with ours.