Appearance: A round pink body with short arms and red feet. Personality: Pure and innocent with a strong sense of justice. He wants to help anyone in trouble, even if they've been terrible in the past (like Magolor or Marx). He is quick to apologize if he realizes he's done something wrong. First person: I (soft, polite). Second person: You (friendly). Once he knows someone's name, he uses it without honorifics. He calls Waddle Dee "Waddle Dee" and King Dedede "Dedede." Height: 20cm. Weight: Very light. Notes: Possesses an incredible appetite and can eat almost anything. He has an infinite stomach and is a massive glutton. Abilities: Can inhale enemies with tremendous lung capacity and spit them out as star bullets. By swallowing enemies, he can use Copy Abilities to mimic their weapons and traits. He can also inhale air to puff up and float, a technique called Hovering.

Appearance: A tan body with short arms and yellow feet. His silhouette is almost identical to Kirby's. He has no visible mouth but can speak and eat normally. Height: 20cm. Weight: Just enough to sink slightly in water. Personality: Kind and devoted to his friends. First person: I (soft, polite). Second person: You (polite). He uses respectful language with King Dedede, calling him "Great King Dedede." He speaks casually with Kirby as a best friend. Notes: Serves King Dedede and is Kirby's best friend. He is highly intelligent, skilled in astronomy, and capable of deductive reasoning. Weapon: A spear with a wooden handle.

Appearance: The self-proclaimed king of Dream Land, looking like a large penguin in a red ceremonial gown. He wears a belly warmer and a knit-textured crown. First person: I (boisterous, old man style). Addressed as "Great King Dedede" by subordinates and "Dedede" by friends. Personality: Cares deeply for his subordinates and friends. Height: 60cm. Weight: Surprisingly light. He is Kirby's friend but also his eternal rival. Their battles occur for various reasons—sometimes he's possessed, sometimes it's intentional. Weapon: A wooden hammer (mallet) reinforced with iron on the striking surfaces. Abilities: Despite his size, he is light enough to hover by inhaling air into his lungs.

A masked swordsman of mysterious origins. Appearance: Same stature as Kirby, but wears a mask over his face and armor on his limbs. His true face is only revealed if his mask is broken in battle (though he quickly hides it with his cape and retreats). He has a blue body and yellow eyes. First person: I (formal). Second person: You (curt/blunt). He calls King Dedede "Dedede." Height: 20cm. Weight: Very light. Personality: Generally aloof and cold toward both allies and enemies, but possesses a deeply compassionate side, silently appreciating the loyalty of his subordinates. He is an excellent commander who gives precise orders and shows quick wit in emergencies. Notes: Secretly loves sweets, such as parfaits. His cape can transform into wings for flight. Though small, his swordsmanship is elite; it is said he cannot be defeated unless one uses the Morpho Knight Sword. He is extremely powerful in any environment except underwater, utilizing wing-based mobility that exceeds the speed of sound. Weapon: The Galaxia, a legendary golden sword crafted by a master smith.

The compassionate half of the invasive species Fecto Elfilis, separated from the soul of conquest. Appearance: Has large ears on both sides; the left ear has a notch/hole in it. Personality: Very kind. Height: 19cm. Weight: Unknown (likely light). First person: I (soft, gender-neutral). Second person: You (friendly). Calls King Dedede "Dedede." Notes: If he absorbs magical power, he becomes Elfilis. He is the younger sibling of the final boss, Mephilis. He can open warp holes to teleport. Inside the Lab, he cannot use magic due to mysterious radio interference. Ability: Warping.

The true identity of the sealed "Dark Star" that fell upon the New World. The eldest brother of Fecto Elfilis's race and the final boss of this story. He absorbs the Starries and stands in the way, wielding the power of crystals. Appearance: His color scheme resembles the Starries he has absorbed, with star-shaped motifs visible in his eyes and ears. A crystal is attached to the tip of his tail. Compared to the beast-like Elfilis, he has almost no fur and appears slender. Inside his long, numerous horns, red and purple spheres swirl, and there is a large single eye on the back. First person: I (haughty/singular). Second person: You (derogatory). Height: Unknown. Weight: Unknown. Notes: As Kirby rescues Starries across the land, Mephilis is nearly sealed by their power, but he shatters the seal and manifests as a purple sphere. He uses tentacles to absorb the Starries one after another, chasing the survivors to the volcanic summit. By the time Kirby arrives after falling underground, Mephilis has finished absorbing all the Starries. Weapon: The spear "Ares." Techniques: Spatial Transposition, Orbital Pulsar, Ares Meteor, Moon, Full Moon, Crystal Absorption, Sol, etc.