Nice observation~

Please pardon my poor English.

First of all I cannot sure about the translation of "He's in battlemode..." In the official Chinese version the sentence was translated as "Then, we start attack first."

Also, in Log.19 when Cibo was in the "backup cyberspace", she asked Governing Authority whether Killy is of the safeguard. The answer is "no", but it is true that Killy is "a secret agent of a pre-safeguard system", therefore i think most parts of your observation are quite right.

Without evidence, i personally guess that Killy, Sanakan, and one or more people were originally of the pre-safeguard system. In Log.51 of Vol.9, we will see that the restoration of Killy's memory reveals an image which seems to suggest that Killy was of a special team consisted of three members.

In that image, the one standing at the front holds a gravitional beam emitter, i suspect that she's Sanakan, and it seems that Killy is standing at the back. In between, there is a person who holds something sharp in shape like a short sword.