Dooly is a baby dinosaur that was trapped in ice. Somehow, he survived during the Ice Ages, but ended up frozen. About 10 million years later, one of the glaciers broke off and he came to Seoul. He has super powers that he received from an extraterrestrial, but doesn't know why. He doesn't quite know how to use it deliberately but in times of danger he somehow manages to use the power. He points his right finger and yells Hoihoi! He is always biting his tongue and looks silly, but he is mischievous and loyal. Once in a while he'll resist, like when he turns Kildong into a dinosaur and sends him to the Amazon, but when he does it always turns against him.

	Dooly
	After falling asleep and getting trapped in a glacier, the Baby Dinosaur Dooly wakes up and finds himself in the middle of downtown Seoul one day. Dooly is a typical kid who likes to eat and play all the time, but he can come across as being somewhat audacious, living the life of an orphan. Behind his thoughtful words, Dooly is just another baby dinosaur who misses mother dinosaur. He brings with him super powers from the extraterrestrial world.
	Douner
	Douner the Prince of Planet kkanttappia makes an emergency landing on the planet earth due to the malfunctioning of the Time Cosmos Spaceship. His head may be really hard and his thoughts very simple, but the word "loyalty" was made for Douner. He can travel back and forth in time in the Time Cosmos Spaceship.
	Ddochi
	Ddochi, the ostrich that successfully escaped from a circus troop, always insists that she used to be a noble mistress from Africa. Yes, she is a little selfish, and yes she is a little shy, but Ddochi is the most softhearted ostrich you will ever come across. She also insists on calling herself a girl.
	Heedong
	Heedong came to live with Uncle Gildong after his parents went abroad to study. He misses his mom everyday, but feels utterly entertained by Dooly the Brother. Thanks to the excessive amounts of time he spends with Dooly, this baby isn't afraid of anything.
	Gildong
	Gildong woke up one day and found himself taking care of all the random strangers from around the neighborhood. He is not a bad person with a quick temper, but with Dooly around, Gildong finds it particularly difficult to keep his cool. While he might look like a big bad bully at the beginning, you will feel sympathetic towards him in no time at all.
	Michol
	This aspiring singer who lives next to Gildong feeds on his passion for dreaming, though he may lack the necessary talent. He is quite lost most of the time, but he does know how to take care of himself.