Lady

Lady is a female Cocker Spaniel who is one of the protagonists of the 1955 Disney Original movie, Lady and the Tramp.

Looks
Lady is a purebred Cocker Spaniel with fluffy brown fur and a lighter, likely cream, underbelly, chest and muzzle. The cream color is also on her paws, going up the back of her legs, and it goes from her muzzle in a straight line up her head. She has long, fluffy brown ears that are a darker color than her fur and a jet black nose. Her eyes are a dark brown.

She has human features, which are her dark black eyebrows and eyelashes.

She has a distinct blue collar with a gold license on it in the shape of a diamond.

Personality
Lady is seen as a very naive, but loyal, sweet and well-behaved dog. She was likely named "Lady" because of her manners and ladylike manners. As much as she comes from a well off household, she doesn't seem to think of her as above the Tramp and is the only one who doesn't disrespect him as Jacques and Trusty do.

She loves her family, as seen by how she saved the baby towards the end of the movie and forgave Tramp. By the sequel, her love and understanding of family seems to have grown as she is seen to have become a loving and caring mother for her pups.

Inspiration
Lady is likely based off of one of Walt Disney's own dogs, a poodle who was named Lady as well.