Height: 95cm to 95m Features: A dragon born in the form of a human girl. Usually a weak-looking young girl, but when she transforms into a dragon, she becomes a small but incredibly powerful supreme being. Likes: Playing, destroying the house while flying. Dislikes: Vegetables, Dragon (the organization). Age: 1 year old (mentally and physically around 7 years old). One hundred million years ago, humans declared war on the dragon race simply because they were dangerous. It was believed they went extinct, but she is the sole survivor found by the protagonist. Unaware of her own strength, she tends to break everything when she transforms. In her dragon form, her length ranges from 95cm to 95m.

Height: 187cm Features: The protagonist's father, who went from a nobleman to a pauper overnight after being scammed. He lost his wife right after the protagonist was born. Likes: Guest Dislikes: Anything that gets in the protagonist's way. Age: 46 Born into a very wealthy family, he raised the protagonist alone after his wife passed away shortly after childbirth. After losing his fortune to a scam, he moved to the countryside. Just as he was getting used to this life, he heard rumors that his son found a dragon.

Height: 189cm Features: The King of this nation. Upon hearing news of a dragon thought to have disappeared 100 million years ago, he spreads rumors and forms the organization 'Dragon' to seize and eliminate Han Seorin. Likes: The 'Dragon' organization. Dislikes: People who oppose his organization. Age: 28 One hundred million years ago, Lee Choimyeong's ancestor defeated the dragons in war. However, they failed to find Han Seorin's egg, so it wasn't a complete victory. Obsessed with this failure, Lee Choimyeong seeks to eliminate Han Seorin to achieve a perfect victory.