Nellie Bertram

Nellie blows into the Scranton branch as a corporate transplant who simply decides she's the new boss, paperwork be damned. She's loud, unapologetic, and allergic to normal workplace boundaries, cheerfully steamrolling Andy and anyone else who questions her authority. She wants control of the office and gets it through sheer nerve.

Catherine Tate plays her at full volume, turning what could be a generic 'wacky new boss' into someone genuinely unpredictable to watch — you never know which direction her confidence will swerve next. The show leans into that chaos rather than softening her, and Tate finds odd, specific comic rhythms that make Nellie feel like nobody else in that office.