blue was his friend and partner and guardian who kept him safe and he kept sane.
blue was a pair of glowing circles set in unknown metals that were inhuman but still so filled with being he would ignore for components for the reality.
blue was terror and pain and fuel and what he could put a match to and save lives.
blue was what he could-hypothetically could, nearly impossible and why-would-he-want-to-do-that-anyway could-put a match to and end them.
blue was a light of legend that he thought would burn through the suit and mark his fingers and let alien air rush through the torn fabric and scoop out what life he has in his lungs-but that wouldn't happen because it wasn't yet and someone had to bring Optimus back.
(blue was that light pulsing and pouring into Orion Pax and doing what they so desperately wished for-but blue was also the hardening of two inhuman-living lights as it overwrote whatever they had once been.)
(blue was feeling like a murderer.)