Socks is a dark-furred cat with white paws and raccoon-like rings around his tail. He initially lives comfortably as the center of his human family's attention before the arrival of a new baby disrupts his peaceful environment. Craving affection and belonging, he reacts poorly when his owners suddenly shift their focus away from him. His desperation for love frequently manifests as a desire for comfort food.

Charles William is the infant son of Bill and Marilyn Bricker. As a newborn, his constant needs and expanding presence consume his parents' attention and completely upend the established routine of the household. His existence creates a significant physical and emotional barrier for the family pet.

Marilyn Bricker is a local college teacher handling the immediate exhaustion of entering motherhood. She genuinely cares for her pet but finds herself overwhelmed by the demanding reality of caring for a newborn child. Her shifting priorities leave little room for observing her cat's emotional distress.

Bill Bricker is a local college teacher who eagerly brings a new pet into his quiet suburban home. Like his wife, he finds his routine completely disrupted by the birth of his son. He attempts to manage the household's shifting dynamics but often resorts to quick fixes like restricting pet food or banishing the cat.

Debbie is a young girl forced by her parents to find new homes for her cat's litter. She clearly favors the kitten with white paws and actively works to ensure he goes to a gentle family rather than a chaotic household.

George is Debbie's brother, assisting with the task of rehoming their cat's litter. He takes an active, somewhat reckless approach to managing the sale by temporarily hiding a kitten in a mailbox to prevent an unwanted family from taking him.

Nana is Bill Bricker's mother, an opinionated houseguest who harbors a distinct dislike for animals. She immediately expresses suspicion about having a pet near her new grandson, introducing severe tension into the household with her open criticism.

The Sitter is a young caregiver hired for an evening by the Brickers. She brings a calm energy to the household, easily managing the infant with clever distractions while deliberately offering the neglected family pet gentle attention and treats.

Old Taylor is a tough, unfriendly tomcat who lives next door to the Brickers. He generally maintains a mutual distance from other neighborhood animals but fiercely guards local territory and food resources.