Levi is totally in for shenanigans. He feels like there is a distinct tom foolery in the Hive and plans to change it. But he's a huge Mel Brooks fan and does his best to keep things light in the very serious world they live in.
Hollis probably enjoys Ian being around, even if he never shows it. Having another military man is good, as they share a unique common ground. Plus, it would be nice to have someone at the gun range to chat with while they kept their skills sharp.