Ford hasn't interacted with Mabel as much as he has with Dipper, however, they are seen to be in good terms with each other. Mabel (along with Stan and Grenda) rescued Ford and Dipper from Probabilitor the Annoying despite Stan and Grenda's reluctance to do so. When Ford called for a family meeting, he allowed Mabel to find a lock of unicorn hair with which to protect the shack from Bill Cipher. Despite Ford's belief that Mabel won't be able to succeed, Mabel returns with the required item, shocking Ford. In return, Ford assures Mabel that she has a good heart.