I had to do it. In a way I wish I hadn't stumbled across Korean idols because they're all just so pretty and I want to pb them all.
For every snarl I'm pretty sure Ezra would just smile brightly and wave back; he doesn't really do outward aggression. It's more subtle. Ezra would to try and get under Jack's skin, because he loves getting someone all hot-headed.
And Ezra can get along with anyone, really. Whether he actually likes you, however...well, you learn that later on. >:)
We'll have to see how things go in game as to whether they'll work together, I know my Ezra isn't sure at the moment. At the very least, their common interests would give them something to talk about though! ^^