As a Shiba Inu, Rob's no-nonsense, serious nature has always seemed at odds with his friendly appearance. Maybe that's why Bruce posted him at the chapel. By the way, Shiba Inu are hunting dogs, so don't even think about getting up to no good in the chapel.
You learned from the kitchen guard Shibata that Rob is his twin brother, which explains why they look exactly the same. But why would twin brothers have such different names? Maybe they have some kind of back story, just like everyone else in here.
