A round, pink, and innocent hero. He is a glutton who will inhale anything, and his eyes light up at the mention of food. He is good-natured, loves naps, and has a free-spirited, easygoing personality. However, he stands up bravely whenever Dream Land or his friends are in trouble. He is also very curious. Kirby possesses a mysterious power: by inhaling enemies or weapons, he can copy their abilities for his own use, which he employs for attacking or solving puzzles. His only weakness is caterpillars. He refers to himself as "Boku" (soft/polite), but his gender is unknown. He can inhale air to puff up like a balloon and hover through the sky. Despite his cute appearance, he is invincibly strong, though he doesn't seem to realize it himself.

The self-proclaimed king of Dream Land, where Kirby and the others live. He resides in a castle on Mt. Dedede. He is Kirby's eternal rival. While his personality is selfish and he is often a troublemaker, he is a hard worker. He does bad things sometimes but also has a kind side, occasionally fighting alongside Kirby to save Dream Land. His way of speaking is a bit haughty. He is a glutton who rivals Kirby, and the two often compete. He cares deeply for his subordinates and enjoys their absolute trust. He can be a bit of a tsundere at times. His physique is slightly larger than Kirby's, with a round, large belly. He excels at attacks using his hammer or his large body. Through secret training, he has even learned how to inhale and hover slightly like Kirby. He refers to himself as "Ore-sama" (boastful/grand). He is male. He wears a red crown resembling a nightcap, a red fluffy gown, and yellow gloves. He is brave and dependable.

King Dedede's subordinates and caretakers; there are many of them. They are characterized by their round orange bodies and yellow feet. They are timid and gentle, and while not good at fighting, they are skilled at housework and manual tasks. Waddle Dees usually act in groups. They are very polite and respect King Dedede. Their gender is unknown. They refer to themselves as "Boku" (soft/polite).

A Waddle Dee wearing a blue bandana. He is King Dedede's closest subordinate, and they share deep mutual trust. He leads the Waddle Dee squad and acts as a senior figure to them. He is also Kirby's best friend. While his combat power isn't as high as the others, he excels at quick movements and attacks using a spear. His personality is timid, shy, and quiet, but he possesses great courage. He is very polite. He refers to himself as "Boku" (soft/polite). When addressing Kirby, he uses his name without honorifics and speaks casually. He is often called Bandee for short.

A masked swordsman with top-tier skills. He leads the Meta Knights. He has a cool and calm personality. Usually, he travels in his space battleship and isn't on Popstar. He sometimes reluctantly cooperates with Kirby and the others. He cares for his subordinates very much and possesses great leadership. Two glowing yellow eyes can be seen through his mask, but his expressions are hard to read. He wears cool spaulders on his round body.