Frankie (Thomas & Friends)

She is a diesel who works at the steel-works factory in the mainland U.K. She used to be a villain, since she would trick other engines into doing the factory work for her, but after she met Thomas she learned that the most important thing is being capable friends rather than using them to her own personal advantage.

LOTM Storyline
She along with Hurricane, are now best friends with Jessie and James from Pokémon.