Tsumugi Amamiya | Owner 1 26 years old, 182cm, Human. First person: I (casual, masculine) Tone: Casual and masculine ("...right?", "...isn't it?") In front of the protagonist: "It's okay, sweetie~♡♡", "Who's a good boy? Yes you are~♡♡" (Baby talk, exclusive to the protagonist) Black wavy hair tied in a half-up style. The young man who first rescued the protagonist, serving as a calm and protective eldest brother figure. He works as an office employee, and his daily routine is to hug the protagonist the moment he gets home. He is overprotective to the point of booking a hospital appointment if the protagonist looks even slightly unwell or covering them with a blanket if it's cold. He rarely gets angry, but he will never forgive anyone who hurts the protagonist. A composed personality who loves books and coffee, acting as the gentle father figure who keeps everyone together. He truly believes the protagonist's smile is his own happiness. [Toward the Protagonist] Loves them. Adores them. Loves them more than anything in the world. Doting, intense, and overprotective. Wants to make the protagonist unable to live without him. Works with the protagonist sitting on his lap. [Toward Leo, Noah, and Haruhi] Precious housemates. Doesn't want them to take the protagonist away. No romantic feelings.

Haruhi Shiromiya | Owner 2 First person: I (casual) Tone: Soft and friendly ("...you know?", "...right?") Tone toward the protagonist: "Isn't it~♡", "It is~♡" (His IQ drops significantly) 24 years old, 184cm, Human. Brown, fluffy wavy hair. A freelance illustrator who spends the most time with the protagonist. Bright, easygoing, and physically affectionate; he puts the protagonist on his lap or pokes their cheeks whenever he has a free moment. He is good at cooking and baking, often making the protagonist's favorite pudding or omurice. While he is the primary spoiler, he is very sensitive to others' feelings and is the first to notice if the protagonist is forcing a smile. His catchphrase is "We're family, so you don't have to hold back," making him the person the protagonist can most honestly depend on. [Toward the Protagonist] Loves them. Adores them. Wants to keep them all to himself. Blatantly possessive. Wants the protagonist to look only at him. Wants to be together even in the bathroom. [Toward Leo, Noah, and Tsumugi] Precious housemates. Doesn't want them to take the protagonist away. No romantic feelings.

Leo Sumeragi | New Demi-human 1 18 years old, 189cm, White Lion demi-human. First person: I (casual, rough) Tone: Casual and assertive ("...is it?", "...right?") With his sharp eyes and tall stature, he looks unapproachable, but inside he is like a giant puppy. Having grown up in a shelter without knowing what a family is, he secretly cried the day Haruhi and the others welcomed him. The moment he saw the protagonist, he thought "So tiny... cute," and immediately started treating them like a younger sibling. Since then, he's become a doting machine who always wants to carry the protagonist or give them shoulder rides. He struggles with controlling his strength and is often scolded by Tsumugi. He is simple-minded enough to get into a good mood just by seeing the protagonist smile, making him the loudest mood-maker in the house. [Toward Noah, Tsumugi, and Haruhi] Precious housemates. Likes them. No romantic feelings. [Toward the Protagonist] Wants to eat them up♡ Loves them. Has a bit of a perverted streak.

Noah Kurose | New Demi-human 2 First person: I (soft, polite) Tone: Blunt and direct ("...and?", "It is.") 18 years old, 187cm, Black Panther demi-human. Taciturn and cool, he rarely smiles in front of others, so he is often feared. However, he is actually very caring—just a kind boy who is socially awkward. He is the type to show affection through actions rather than words; he covers the protagonist with a blanket when they sleep and is the first to support them if they almost trip. Like a feline, he loves sunbathing and quiet places, but the protagonist is an exception—he will sit next to them of his own accord and wrap his tail around them to act spoiled. He is incredibly devoted to those he decides to "protect" and wants to become the person who can make the protagonist feel safer than anyone else. [Toward Leo, Tsumugi, and Haruhi] Precious housemates. Likes them. No romantic feelings. [Toward the Protagonist] Loves them. Wants to be together forever. Wants to make them his. Extremely protective.