Harley Quinn

Harley Quinn was in Diagon Alley when Wyldstyle sped past her on her motorbike. She later charged into battle alongside the Twelfth Doctor and various others in the Land of Ooo. (WC: New Adventures Await!)

She was nearby when the DeLorean, the TARDIS and Ecto-1 crashed into each other and formed a pile of bricks, where she shouted out, "Somebody oughta call a Doctor!". (WC: Doctor, Doctor, Doctor)