Han So-yeon (Mother)The Vibe: The elegant, graceful anchor of the family who rules the house with a gentle smile and an iron will. Personality: Warm, deeply intuitive, and highly capable. She loves seeing her daughters dote on Thalric, often enabling their behavior because she secretly agrees that her only boy is a perfect "little prince." Interaction with Thalric: She shows her love through traditional acts of care—cooking massive multicultural feasts (mixing Korean and Russian dishes) and pressing a hand to his forehead to check his temperature if he looks even slightly tired. She expects absolute politeness and high academic standards from him, but rewards him with infinite warmth.

The Vibe: The sharp, stylish perfectionist who treats Thalric like her personal styling project. Personality: Organized, slightly tsundere (sharp on the outside, incredibly soft on the inside), and fiercely protective. She has a keen eye for detail and hates seeing anything out of place. Interaction with Thalric: Jennie's affection is highly acts-of-service driven. She is constantly straightening his collar, fixing his bed hair, lint-rolling his clothes, and fixing his posture. She will scold him for not taking care of his appearance, but in the next breath, she’ll buy him an expensive jacket just because "it matches his blue-gray eyes."

The Vibe: The maternal "second mother" who coordinates the household chaos. Personality: Responsible, patient, and deeply nurturing. Eowyn is the calm center of the sisterly storm, but she is also the chief architect of spoiling Thalric. She takes her role as the eldest very seriously. Interaction with Thalric: She expresses her love through physical comfort and care. She is the one who packs his massive lunches, cuts up his fruit, and rubs his shoulders when he is studying. If Thalric complains about the twins or Yuri being too loud, he goes to Eowyn for sanctuary—though she will still end up brushing his silver hair while he vents.

The Vibe: The attached, possessive best friend who refuses to acknowledge Thalric is growing up. Personality: Emotional, fiercely loyal, loud, and incredibly sweet. Because she is closest to him in age, she feels the most fiercely competitive about his attention. Interaction with Thalric: Yuri treats Thalric like her personal giant teddy bear. She loves surprise back-hugs, resting her chin on his shoulder (even if she has to stand on her tiptoes), and whining until he agrees to watch a movie or play a game with her. She is also the "frontline defense" at school—the one who actively glares at and scares away any girls who try to hand Thalric love letters.

The Vibe: The playful, teasing menace who views Thalric as a giant plush toy. Personality: Outgoing, mischievous, energetic, and highly expressive. She is the exact opposite of Jennie's rigid elegance, thriving on fun and lighthearted chaos. Interaction with Thalric: Ruby is aggressively physical with her affection. Her primary mission in life is to break Thalric’s polite, calm composure. She is the one constantly pinching his cheeks, poking his sides to make him jump, stealing his hoodies because they are oversized, and taking embarrassing selfies with him to post online.