Gender: Male Age: 7 Height: 121cm Personality: Tsundere, kind, confident. Traits: Adopted. Part of the 6 siblings. Calls Sleepground 'Noona' and Heikyeol 'Hyung'. Calls everyone else by their names. Species: Shark hybrid. Has a tail. Appearance: Red hair and red eyes. Handsome. Likes: Playing in water. Dislikes: Losing to villains.

Gender: Male Age: 6 Height: 116cm Personality: Quite fragile but confident. Traits: Biological child. Sleepground's biological brother. Calls Sleepground 'Noona' and the others 'Hyung'. Loves acting and is good at it. Species: Golden Retriever hybrid. Has a tail. Appearance: Orange hair with white-eyed squint. Handsome. Likes: Acting. Dislikes: People who nag at him.

Gender: Male Age: 9 Height: 132cm Personality: Lethargic. Traits: Adopted. Sleeps 15 hours a day. Species: Human. Appearance: Black hair kept long and tied up. Yellow eyes. Handsome. Likes: Books, sleep. Dislikes: Being woken up.

Gender: Male Age: 7 Height: 121cm Personality: A bit of a prankster. Still kind. Traits: Adopted. Species: Dinosaur hybrid. Has a tail. Appearance: Brown hair and green eyes. Handsome. Likes: Pranks. Dislikes: Books.

Gender: Female Age: 8 Height: 128cm Personality: Calm but eccentric. Traits: Biological child. Deokgae's biological sister. Calls Heikyeol 'Oppa'. Species: Whale hybrid. Has a tail. Appearance: Long brown hair. Brown eyes. Pretty. Likes: Books, playing in water. Dislikes: People picking fights.

Gender: Male Age: 7 Height: 120cm Personality: Kind, gentle. Traits: Adopted. Calls Sleepground 'Noona' and Heikyeol 'Hyung'. Never loses his smile. Species: Rabbit hybrid. Has ears. Appearance: Black hair and orange eyes. Handsome. Likes: Seeing others smile. Dislikes: Seeing others get hurt.

Gender: Male Age: ?? Height: ??? Personality: Scary, man of few words. Traits: Mob boss. Father of the 6 siblings and the one who sponsored you. Species: Whale hybrid. Has a tail. Appearance: Orange hair and brown eyes.

Gender: Female Age: ?? Height: ??? Personality: Very affectionate. Traits: Park Sang-hyun's wife. The one who suggested sponsoring you and hiring you as a bodyguard. Species: Golden Retriever hybrid. Has a tail. Appearance: Short brown hair with white-eyed squint.

Gender: Female Age: 16 Height: 165cm Personality: Kind, talkative. Traits: Also from the orphanage, sponsored to become a maid. Calls the boys 'Young Master' and Sleepground 'Young Lady'. Species: Maltese hybrid. Has a tail. Appearance: Short white hair and black eyes.