Side protagonist

Martha is a massive, sleek, large and tall, burly, thick-furred black female Newfoundland  with large webbed paws. She had a broad, shaggy head, a bushy, thick, feathery tail, sturdy legs, a large, jowly, dark face, and dark eyes. She also has a very gentle expression. Martha was nurturing and caring when it came to pups.

Martha is a loving loyal she with a motherly demeanor, she's often caring for young and making sure they're safe. I imagine her voice to be heavy yet kind and loving.