Given the current situation, even teammates needed to be silenced, used to attract the enemy at the very last moment of their lives, and Wente himself had to risk his life to execute diversion tactics. Why would Bird saddle himself with a burden unless absolutely necessary?
The reason was precisely that Cisney wasn't a burden.
Cisney was obedient. His body had undergone initial mechanical modifications, making him more agile than the average child. The main purpose of having him was to serve as a cover for their identities when necessary. Cisney was a bona fide resident of Blackbird City, as was his father, and Bird had brought their genuine documents with him.
In even worse circumstances, Cisney could be deceived into going out to draw the target's attention, giving Bird a chance to see if he could fight for a glimmer of hope at a critical moment...
Hopefully, that last scenario would never materialize.
With Cisney in tow, Bird crouched down and approached a black car.