Dr. Griffiths

Dr. Martin Griffiths is a scientist whose primary field of study seems to be lepidopterology - that is, the study of butterflies and moths. He considers himself to be extremely rational and has little patience for things he believes to be fantasy, such as fairies. Although he is often absorbed in his work, he loves his daughter, Lizzy Griffiths, very much.

He is actually the uncle of Christopher Robin, Wendy Darling, John Darling, Michael Darling, and Alice.

Tinker Bell and the Great Fairy Rescue
He mostly ignored Lizzy most of the time, busy with other things such as the leaks which Tinker Bell fixed. Lizzy tried to convince him to believe in fairies, when he didn't that made Tink mad causing him to almost capture her. Instead Dr. Griffiths captured Vidia, he had intended to show her to other scientists in the hopes of furthering his career, but Lizzie eventually convinced him to let Vidia go.

Trivia

 * His first name is never given in the film, but is stated on his character page on Disney's official site and in a deleted scene.
 * He and Lizzy would join Peter Pan, Wendy, John, Michael, Tinker Bell, Rosetta, Iridessa, Fawn, Silvermist, Terence, Clank, Bobble, and Vidia on their adventures spinoffs.
 * He also reveals to be Alice's uncle in Peter Pan and Tinker Bell's adventures in Alice in Wonderland.
 * He and Lizzy both mentioned that they knew Sherlock Holmes and Mr. Barrie in Peter Pan and Tinker Bell's adventures of the Great Mouse Detective.
 * He and Lizzy would guest star in some of Pooh's Adventures series along with Tinker Bell and her friends of Pixie Hollow.
 * He is voiced by Michael Sheen
 * Though he understands that Rosetta already has a crush on one of Periwinkle's friends, he couldn't help but have some feelings for her too.
 * He and Lizzy have been gifted by the ability to hear and talk to Fairies. If they ever need them, they'll think happy thoughts and the fairies will sense them.