I've got $10 on Charlie. Ian might be the officer, and they're roughly the same size, but I think Charlie is a bit more willing to fight dirty in a fist fight.
Bro, that's the ONLY way to do it.
Do it first, do it fast, and do it dirty.
Fair fights are for school yards and pay-per-view events.
As far as the crewchief versus the officer battle, the crewchief always wins.
"Sir, I think I better take another look at that bearing/seal/corrosion whatever. It might actually be out of limits."
It's probably not, but the pen truly is mightier than the sword, and the poor fool that gets sideways with his crewchief finds his flight time dissipating during the maintenance action required to correct whatever writeup the crewchief just put in the logbook.
There's also a standing order among crewchiefs- don't let the pilots kill you. Attempts on your life by pilots are always prefaced with some sort of phrase resembling:
Commissioned Officer: "In my experience....."
Warrant Officer: "Hey, check this out...."
To be fair, the only serious issue I had along those lines in actual flight were at the hands of a warrant officer. I've never seen that many red Marconi lights on the panel before- 120% Rotor RPM is a BAD thing.
He and I had words after the fact.