Mavis

This is just an ordinary episode for me as it's not too exciting. However, I never would've known that Mavis was initially stubborn and naive instead of being her wise self. Toby was simply trying to help Mavis and if she doesn't want to listen then that's her problem. Sure enough, she got in a predicament with the Troublesome Trucks. As you know, there's a level crossing along the quarry line and Toby stops before the lane and he sets off again after his fireman halts the road traffic. Mavis instead stops at the lane which causes the mischief with the Troublesome Trucks. Toby still helps Mavis despite their tension.