This is Queenie, who is now almost 9 years old. Apparently, she was either trying to get some lap time (she saw her younger, larger brother do that) or point out which parts of the desk are messiest!
She's in charge and doesn't let Bogie bully her. When he tries to play or bite her, she smacks him, and waltzes away (rarely does she run from him). Queenie also loves to bully Noel, though. We've only had Bogie two years, and I never had three cats before that, so I'm not sure if there's always a pecking order or not.