Although I did recover the gun, I couldn't use it before him anymore. If I did, and he picked up on how to use the gun, then I'd be screwed if it ever landed on his hands again.
"Fina, do it!"
I quickly backed off as Fina sent the same fog into the space between me and Noir. Afraid of stepping into it, he once more created a vortex with the tentacles and cleared the purple and pink smoke. I was able to take enough distance with the time it took for him to clear everything, though.
Under the cover of the smoke, I managed to load the next bullet properly. However, I can't miss this shot. Instead of shooting instantly, Fina and I moved around, keeping our distance and attacking him using long-range attacks.
I previously lacked such a form of ranged attack. But with the new contract with Fina's previous tamed monsters, whom we left behind in fear of them accidentally dying on the battlefield, I gained a few skills capable of doing so.