Finn the Human

A human was present in a field, where he fist bumped with a yellow dog while declaring "It's battle time!". He later charged into battle alongside the Twelfth Doctor and various others in the Land of Ooo. (WC: New Adventures Await!)

Behind the scenes
Although named in LEGO Dimensions, Finn the Human does not get such treatment in New Adventures Await!.

David Bradley voiced an elderly version of Finn in the episode, Together Again.