Doctor Who: 30 NuWho Characters Who Would've Made Fantastic Full-Time Companions

Appeared in: The Pyramid at the End of the World.

What a legend Erica is. She sympathises with the hungover dad from My Parents are Aliens by getting him coffee and suggesting he sleep it off under his desk. This is exactly what you want in a companion after you've had a few at the Zaggit Zagoo bar. Oh, and being all calmness personified when staying behind to get rid of a doomsday superbug that’s just dissolved dopey Douglas.

That beaming look on Erica's face when the Doctor says to her: "Seriously, what are you doing when this is all over?", is all of us Whovians if we were asked that particular question.