Cloud just gives the other a look that screams 'Asshole', but there's a softness there--a fondness that makes it clear he's not really upset. This sort of banter, these sorts of comments...he's missed them. Sure several of the others have a wit and charm all their own but they weren't Zack.

And then Zack has to go and bring up age.

The blonde's look melts into something completely dry now and he just stares at the other.

"I'm twenty-three." Twenty-three Zack. Don't you dare try and call him 'Old Man' because he will punch you right in the face.