Be careful!
Can't get fired ? Ohh be careful. Much easier to replace a co-pilot than a Captain. I suggest you keep a diary and later present it to management when not short staffed.
This will not be easy I agree !!!!!
Remember if he presents himself to management as a nice guy who do you think they are going to believe?
You must be coy and very patient.
And most of all remember that you will NEVER be this type of Captain.
Good luck and best wishes. Been there.
kp