Now ...or I'm crazy here or the author make a big plote hole or Arca herself is crazy.
If arca will was don't let AA gain the chip then why she help him to kill the resistance?then again this can be count like
gain Archlight trust
But then why he try to kill cruz ..cruz die= danger that some one found both the half of the chip (if we go with the theoy that the other half is inside cruz brain).
I mean between testamen and Kafka.
Then we have the whole Simeon tower incident or the bloody rain incident. (and here there is again the danger that the other half fall in the hand of simeon).
I dont deny that there is the chance tha the other half of the chip is inside cruz...still dont make to much sense with the story or better arca behavior....that's why I say there as to be more to her behavior after the PFZERO incident.