Oh my, this is too funny!
Junior- we call him Yoda, he is old and fat and wise and if the other 2 cats bother him, he just swats them with a paw, and they leave him alone
Boo Boo - Not sure, but he would be British as he sits so prim and proper, yet will just plop himself down on the floor whenever he feels like it..maybe a young prince learning his way around "society"?
Brody - he would definitely be a street thug, he is sneaky, hides around corners and under the table, attacks everything and anyone, we constantly have to chase him out of the garbage and off the kitchen counters, wants to fight the other two cats all the time