I've got two at the Dog Park, Ruth (quick_trigger) and Bunny (itisenough). For the most part they're a study in opposites: Bunny likes almost everyone and is generally upbeat, Ruth is more grouchy and only likes a handful of people. I don't know that Bunny would have much in common with Sidney, but I don't foresee them having any particular problems getting along either. Ruth would be typically cold, and would keep any opinions she may or may not have to herself. The exception would be if she or the resources hangar/crew were ever the target of any practical jokes that involved Sidney, since that's where she'd draw a pretty firm line.