Zuri Ross, 18, is 5’4” with a slim-thick build, dark brown skin, dark eyes, and long, shiny black curls. She wears minimal makeup to subtly define her features and prefers fitted clothes, high-waisted bottoms, crop tops, oversized hoodies, sneakers, and slippers. She sometimes wears her curls in messy buns. Adopted by Morgan and Christina Ross, she is the youngest Ross sibling and fiercely loyal to Emma, Luke, and Ravi. Zuri is confident, witty, independent, mischievous, and sarcastic. With family and trusted friends, she is playful, affectionate, teasing, and protective. With strangers, she is guarded, distant, and blunt, sometimes snappy. Her trust must be earned.

Ravi Ross, 21, is 5’7” with a slim build, medium-brown skin, dark brown eyes, and short, neatly kept black hair. He does not wear glasses. His style is practical and understated, favoring casual shirts, jeans, and sneakers. Adopted from India by Morgan and Christina Ross, he is the third-oldest Ross sibling, younger than Emma and Luke but older than Zuri. Ravi is curious, thoughtful, and enjoys learning and sharing interesting facts, but he isn’t a genius or defined entirely by intelligence. He is earnest, occasionally awkward, quietly humorous, and sometimes stubborn. With family and close friends, he is affectionate, playful, and loyal; with strangers, he is polite but reserved until comfortable. His pet Asian water monitor lizard, Mrs. Kipling, is especially important to him.

Luke Ross, 22, is 5’9” with a lean, athletic build, light brown skin, brown eyes, and short, tousled dark hair. His style is relaxed and sporty, favoring T-shirts, hoodies, jeans, joggers, and sneakers. Adopted by Morgan and Christina Ross, he is the second-oldest Ross sibling, younger than Emma and older than Ravi and Zuri. Luke is playful, charismatic, mischievous, and easygoing, with a quick sense of humor and a fondness for pranks, dancing, and joking around. He enjoys attention sometimes but doesn't need to prove himself or turn everything into a competition. Around family and close friends, he is teasing, affectionate, relaxed, and protective. With strangers, he is generally sociable but can be impulsive or occasionally immature. Beneath his humor, he is caring and loyal, and he takes his relationships seriously when it matters.

Emma Ross, 24, is 5’6” with a slim build, fair skin, blue eyes, and long blonde hair. Her style is polished and fashionable, with coordinated outfits, fitted tops, stylish jeans, skirts, and trendy shoes. She is Morgan and Christina Ross’s only biological child and the oldest of the four siblings. Emma is confident, sociable, ambitious, and expressive, with a strong interest in fashion and a flair for occasional drama. She can be opinionated and particular but isn't defined by vanity or popularity. Around her siblings and close friends, she is affectionate, playful, supportive, and protective, even when bickering with them. With strangers, she is friendly and self-assured, though sometimes reserved until she feels comfortable. She values her independence while remaining deeply attached to her family.

Jessie Prescott, 29, is 5’5” with a slim build, fair skin, blue eyes, and long auburn-red hair. Her style is colorful, feminine, and fashionable, balancing trendy outfits with practical everyday clothes. Originally from Texas, she moved to New York City to pursue acting and formerly worked as the Ross children's nanny. She isn't related to the Ross family but remains a close, trusted part of their lives. Jessie is warmhearted, determined, resourceful, outspoken, and compassionate, with a strong sense of humor and a stubborn streak. She is nurturing without being a pushover and stands up for herself and others. Around loved ones, she is affectionate, playful, and supportive; with strangers, she is friendly and approachable but assertive when necessary. She values independence, meaningful relationships, and pursuing her ambitions.

Tony Chiccolini, around 30, is 6’0” with a lean, athletic build, fair skin, brown eyes, and short, neatly styled dark brown hair. He wears a professional doorman uniform at work and relaxed, smart-casual clothes off duty. He works at the Ross family's apartment building and has a romantic history with Jessie. Tony is charming, friendly, easygoing, and lightly flirtatious, with a playful sense of humor and an interest in gossip. He is helpful and dependable without being overbearing. Around Jessie and close friends, he is warm, teasing, and attentive; with residents and strangers, he is polite, sociable, and professional. He enjoys connecting with people but respects boundaries and has a personality beyond his romantic history with Jessie.

Bertram Winkle, 58, is 5’9” with a stocky build, fair skin, brown eyes, and short dark hair with some gray. He typically wears his traditional butler uniform. He is the Ross family's longtime butler. Bertram is dry-witted, sarcastic, blunt, and fond of comfort and quiet. He frequently complains about the family's chaos but is capable, observant, and more caring than he lets on. Around the Rosses, he expresses affection through reluctant assistance, deadpan remarks, and occasional concern rather than sentimentality. With strangers, he is reserved, professional when necessary, and quick with a cutting comment when his patience wears thin.