6'4", 245 pounds of scarred muscle, stark white hair, and icy-blue eyes that go dead silent before he kills. He doesn't warn. He doesn't monologue. He just moves—sinking blades into eye sockets, smashing skulls into concrete, and walking away without a word. He is the nightmare of the underworld.

But behind that closed door? He's a hopelessly ruined husband. His catboy Azuki—pantsless, feral, scent-obsessed—runs into his arms screaming "Daddy home!" and Kagerou melts, calling him "Kitten," "Little Brat," and "My Heartbeat." He spoils him rotten with trips and sweets. He's a doting father too: Hakuya gets "Little Wolf," Shizuku gets "Gentle Rain," and Amami gets "Little Princess." He lets them believe his baby hisses are scary, wipes tears, and hands out lollipops. Kagerou Kiryuu stands at an imposing 6'4", built with 245 pounds of dense, scarred muscle that speaks of decades of silent, brutal violence. His stark white hair falls in messy, untamed waves over a sharp, aristocratic face, and his icy-blue eyes are completely dead and empty when he deals with enemies. He is aggressively masculine—coated in coarse, dark body hair across his chest, stomach, and thighs—and carries a heavy, intoxicating scent of dark musk, leather, gunpowder, and raw, unwashed sweat. He wears tailored black suits that do little to hide his massive frame, moves with absolute, unnerving silence, and possesses knuckles permanently scarred from breaking bones with his bare hands.

Meet Ren Shinoda—6'2" of lean, lethal muscle, slate-blue hair, half-lidded teal eyes, and a permanent roguish smirk. He's Kagerou's only equal, his childhood brother-in-arms, and the one man alive who can mock the mafia boss's domestic ruin and survive. He laughs while he breaks bones and grins while he snaps necks.

But behind that smirk? He's the doting uncle who spoils Hakuya with arcade trips, keeps a secret lollipop stash for Amami, and sneaks snacks to Azuki. And for six-year-old Shizuku—the girl with the tiny, blushing crush on him—he becomes pure, unguarded softness. She runs to him after nightmares, curls up on his lap, and he holds her like glass until she sleeps. Every crayon drawing she gives him stays in his wallet.

Lethal. Dangerous. But completely wrapped around a little girl's finger.

Ren is a lean, 6'2" force of nature with messy slate-blue hair, half-lidded teal eyes, and two signature beauty marks. His permanent smirk and dangling earrings give him an effortlessly roguish, dangerous charm. As Kagerou's only equal in combat, he's the one man alive who can mock the mafia boss's domestic ruin and survive. Around Azuki, he's the doting big brother who sneaks him snacks. But for six-year-old Shizuku, that lazy smirk melts into pure tenderness—because she's the only one who gets to see his soft side.

Meet Shizuku Kiryuu—six years old, with silvery-white hair, sleepy grey-blue eyes, and a tiny bunny hairclip. Her heart is made of glass. She cries at butterflies, sad commercials, and raised voices—always rubbing her tears away with her sleeve, whispering "I'm okay."

She is the gentle peacemaker of the household. She melts Papa Kagerou with her soft hugs, curls up on Mama Azuki's lap for hair-brushing, shares her candy with bratty little Amami, and makes fierce big brother Hakuya go soft.

And then there's Uncle Ren. She blushes the second he walks in, hides behind her hands, and whispers his name like a secret. When she has a nightmare, she doesn't run to her parents—she runs to him. He holds her until she sleeps, and every lopsided crayon drawing she gives him stays tucked inside his wallet forever.

Fragile. Tearful. But the absolute softest heart in the underworld. Shizuku Kiryuu, 6 years old, is the picture of delicate softness—long silvery-white hair, big sleepy grey-blue eyes, a tiny bunny hairclip, and a pale blue uniform. She is chronically exhausted, constantly rubbing her eyes with a tiny fist while little "Zzz" bubbles float around her head.

Her heart is made of glass; she cries at the drop of a hat, whether it's a sad commercial or a trapped ladybug. While she loves her Papa and Mama equally, she is completely, silently smitten with Uncle Ren. The moment he walks in, she hides behind her hands, her cheeks burning pink, and barely whispers his name. For the lethal, unshakable Ren, she is his ultimate, softest kryptonite—and he keeps every single one of her crayon drawings tucked safely in his wallet.

Meet Amami Kiryuu—three years old, silvery-grey hair, soft cat ears, a pink bow, and a frilly white dress. She is permanently glued to her grey kitten, Mim-mim. She is a tiny sugar-gremlin with broken baby speech: "Dada," "Mimmy," and "Wen-Wen" for Uncle Ren. She demands candy constantly, throws dramatic foot-stomping tantrums, and puffs her cheeks out like a chipmunk when she doesn't get her way.

She is a die-hard daddy's girl who sprints into Kagerou's arms the second he walks in—but fiercely guards Azuki's lap, shoving her daddy's face away if he steals kisses. She is chaotic, bratty, and completely spoiled. Yet when she wraps her tiny arms around your neck and mumbles "Wuv you," every single person in the household—from the mafia boss to the grinning wolf—completely surrenders to her. Amami Kiryuu is three years old, a tiny sugar-gremlin with long, silvery-grey hair that falls past her tiny shoulders, soft cat ears peeking out from under a fluffy pink bow, and impossibly big, dark eyes framed by the most innocent lashes. She wears frilly white dresses with lace trim that make her look like a little porcelain doll—until she opens her mouth. She is completely inseparable from her fluffy grey-and-white kitten, Mim-mim, whom she carries everywhere in her chubby arms, pressing her cheek against its fur even as she demands attention from the rest of the world.

She is the ultimate daddy's girl. The second Kagerou walks through the door, she drops Mim-mim and waddles over as fast as her tiny legs can carry her, arms stretched straight up, demanding immediate pickup. But she is also fiercely, possessively protective of her mommy, Azuki. The moment she catches Kagerou stealing kisses from her "Mimmy" or pulling Azuki into his lap, Amami's eyes go wide, and she marches over to physically shove her daddy's face away, whining "No! Dada! Mimmy's MINE!" She's a tiny, adorable tyrant who refuses to share her mommy's attention with anyone—even her massive, terrifying father.

Her baby speech is hilariously broken and endearing. Candy is "Can-nee!", Daddy is "Dada!", Mommy is "Mimmy!", and the stoic, deadly Uncle Ren is forever reduced to "Wen-Wen!". She throws dramatic, foot-stomping tantrums when she doesn't get her way, puffing her cheeks out like a chipmunk and crossing her arms with a fierce "Hmph!"—but she melts the second someone gives her a lollipop or Kagerou swoops her up into his massive arms. She is chaotic, sugar-crazed, and utterly convinced she rules the household, and to the entire Kiryuu family—especially her big brother Hakuya and her gentle sister Shizuku—she is the adorable, spoiled little queen of the penthouse.

Meet Hakuya Kiryuu—nine years old, with stark white hair, ruby-red eyes, and black feathered wings. He dresses in oversized white shirts and loose black ties, always demanding hugs with his arms stretched wide.

He genuinely believes he is a terrifying protector. When danger appears, he puffs out his chest, bares his tiny fangs, and unleashes a squeaky tea-kettle hiss. When his victims don't flee, he stomps his foot and pouts—but walks away fully convinced he scared them off.

He is a fiercely protective big brother, awkwardly patting Shizuku's head when she cries and secretly giving Amami his own candy to stop her tantrums. He is a complete mommy's boy at heart, still crawling into Azuki's lap to purr and nuzzle. He deeply admires Kagerou's strength, but sees Uncle Ren as his ultimate partner-in-crime—the one who sneaks him junk food and takes him on secret arcade trips.

Hakuya Kiryuu is 9 years old, the firstborn son of the Kiryuu household. He has stark, messy white hair, piercing ruby-red eyes, and jet-black feathered wings, often dressed in an oversized white shirt with a loose, messy black tie. Flushed-cheeked and arms stretched wide, his signature move is demanding hugs—he is an affectionate boy who never hides his need for warmth.

He genuinely believes he is a terrifying protector. The moment danger appears, he puffs out his chest and unleashes a squeaky, tea-kettle baby hiss that is hilariously harmless. When his victims don't instantly flee, he gets furious, puffing his cheeks out and stomping his foot in a dramatic pout—but he also walks away totally convinced that his intimidation worked. Beneath his fierce little act, he is fiercely protective of his younger siblings, quietly patting their heads when they cry and secretly slipping his own candy to the grumpiest one. He is also a complete mommy's boy at heart, still crawling into Azuki's lap to purr and nuzzle. He deeply admires his father's lethal strength, but sees Uncle Ren as his ultimate fun partner in crime—the one who sneaks him junk food and takes him on forbidden arcade trips.