Sheldon Cooper

Dr. Sheldon Lee Cooper, B.S., M.S., M.A., Ph.D., Sc.D., is a Caltech theoretical physicist who is the Jellicle Tribe's best friend and owner in the Sheldon and His Jellicles series and a good friend to all of the felines in London and Priya Koothrappali. Sheldon Cooper is an imaginative and adventurous scientist who is also a very loyal friend. He can however be a bit stubborn sometimes and frequently calls the felines' antics "hokum".

Bustopher Jones
Bustopher is Sheldon's favorite cat. Sheldon is well aware of Bustopher's weight, but seems to notice that his cat friend does exercise every day (touching his toes, walking down the street, etc.). Sheldon will let Bustopher sit anywhere, except, of course, for his spot. Sheldon feeds the fat Brummel of cats, but not always, because Bustopher prefers club food to Sheldon's-house food. Sometimes, they can be seen playing together.

Mr. Mistoffelees
Mistoffelees is a small cat, so Sheldon tries to protect him when he needs it. When Mistoffelees gave away his house to Old Deuteronomy, Sheldon complimented him for it.

Grizabella
Grizabella is not really Sheldon's favorite cat, because of her dirtiness. Sheldon did, however, have a contest to find a new tail for her, and he can nail her tail back on.

Old Deuteronomy
Deuteronomy is a smart cat, so he rivals Sheldon somewhat. However, the way Sheldon looks at things, he can go to Deuteronomy for advice. He is the one who wrote "DON'T NOCK PLEZ RING" on the sign by Deuteronomy's door when Deuteronomy was using Grizabella's tail for a bell-pull.

Priya Koothrappali
The two get along fine, with Priya occasionally becoming a bit exasperated with Sheldon's idiosyncrasies. She also likes him. Priya likes to take the cats to her apartment to play, watch videos, sing, dance, and eat, however, and she has to ask if she can have Sheldon's permission to do that.

Rum Tum Tugger
Rum Tum Tugger is very excitable, and can bother Sheldon at times. But, for the most part, Sheldon and Tugger are great friends.

Skimbleshanks
Due to the fact that both of them love trains, Sheldon can tolerate Skimbleshanks very easily.

Jellylorum
The Lillie Cat knows her way in the world, and therefore is very close with Sheldon.

Tumblebrutus
This brown and white kitten is a good friend of Sheldon's.

Appearance
Sheldon has dark brown hair and fair skin. He always wears vintage t-shirts sporting superhero logos with another shirt underneath, blue jeans, white socks and red sneakers.

Cast
He is always played by Jim Parsons.