Characters / Cave Story

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    Main Characters 

Mister Traveler/Quote

The Playable Character. An amnesiac who awakes in a small cave in the depths of a strange island.

Curly Brace

A mysterious young woman who seems to know a bit about our hero.

Sue Sakamoto

A fiery young girl being pursued by the Doctor's henchmen.
  • Badass Boast: Gives one before fighting Igor. She fearlessly tells him to "Bring it on!" and that she's stronger her brother. However, that doesn't mean much as said brother isn't particularly strong, and unfortunately it doesn't end well for her...
  • Baleful Polymorph: Got shapeshifted into a mimiga thanks to Misery.
  • Demonic Possession: By the Doctor in the final battle. Temporary, fortunately.
  • Distressed Damsel: On several occasions.
  • Faux Action Girl: Just as she encounters a frenzied mimiga, she brags about how she defeated Kazuma in a fight (which isn't saying much). Cue No-Holds-Barred Beatdown.
  • Promoted to Playable: The Nintendo Switch version upgrades her status to playable for a second player.
  • Tsundere: First time you meet her, she gets rather annoyed if you say you wanted to save her (and annoyed if you say no), but she eventually softens.
  • You Gotta Have Blue Hair: Her true hair is green.
  • X Marks the Hero: Has an X-mark over her nose. It's even visible in her human form.


The leader of the Mimiga village, and Toroko's brother-figure.


A strange—if happy-go-lucky—monster under the command of the Doctor


A young witch under the command of the Doctor.

The Doctor (full name: Dr. Fuyuhiko Date)

The cruel tyrant of the island. Formerly the research group's medic, he discovered the Demon Crown and went mad with power.

    Important Characters 


A Mimiga warrior, and Toroko's brother. He was killed by the Doctor.


A young Mimiga and Sue's friend.

Kazuma Sakamoto

Sue's older brother.
  • Butt-Monkey: He is mostly seen trapped in a warehouse whining, and his younger sister Sue beats the crap out of him often.
  • Dirty Coward: Of all the characters, Kazuma is the most cowardly. At the beginning of the game, he's begging for help from his little sister, who is in actual danger. Near the endgame, he decides to abandon the island, leaving behind his sister and the rest of his companions. Accepting his offer to go with him leads to the game's worst ending.
  • Distressed Dude: He's first met locked up inside a Grasstown shelter.
  • Eyes Always Shut: Both in his overworld sprite and portrait.
  • Mr. Fixit
  • Pointless Band-Aid: Has one on his left cheek.
  • You Gotta Have Blue Hair: Has green hair.


An old lady who lives in the Sand Zone. She has five lost puppies, and requests that the hero find them for her.
  • All-Powerful Bystander: She's just as powerful as Ballos and could have killed him when he lost his mind, ending the drama before it began... but she couldn't bring herself to kill him.
  • Chekhov's Gunman: She is Ballos' sister, and the one who sealed him away after he went out of control. She is also Misery's mother.
  • Miniature Senior Citizens: She's the same height as the hero, who's half the height of most humans.
  • Retired Badass: Again, she sealed Ballos, assuming he was powerful back then as well, that must have required really strong magic.


A cowardly engineer transformed into a Mimiga.

Professor Booster

The former research party's technician.
  • Jet Pack: He gives one to you over the course of the game.
  • The Professor: Of course.
  • Red Herring Mole: Professor Booster appears as a grumpy-looking, old scientist in a white coat wearing opaque, signal red glasses. It doesn't help that the game's main antagonist throughout the story is also a doctor in a white coat. Nonetheless he never switches sides, and even stays loyal until his death in one continuity of the game, giving away an item to the protagonist with his last bit of strength that he could otherwise have used to save himself.
  • Violation of Common Sense: There is a point where he falls and gets major injuries. Ignore him completely and he will come back alive and well with an improved Booster 2.0.

Momorin Sakamoto

The mother of Sue and Kazuma.


Once Jenka's kind and loving brother, now a mad sorcerer trapped in the depths of the island.
  • Ambidextrous Sprite: Averted. His eyes keep proper colors no matter what direction he faces.
  • And I Must Scream: His powers are beyond even his control now, and has been living a long time with that in mind.
  • Badass Longcoat: Wears one during the first phase of your battle against him, and just like the Doctor, loses it at the second phase of the battle.
  • Boss Bonanza: Comes right after the Heavy Press.
  • Being Tortured Makes You Evil: he was tortured until his massive magic reserves exploded and destroyed the city he loved. His mind couldn't take the strain. Since that moment, he's been a danger to himself and everyone else.
  • Death Seeker: He waits for the person who can finally kill him and subdue his powers.
  • Evil Is Burning Hot
  • Greater-Scope Villain: While he's not directly commanding the Doctor, he created the Demon Crown, and as long as he's alive, the Demon Crown will always regenerate after being destroyed.
  • Hate Plague: His rage and insanity, coupled with his out-of-control powers, causes both the Demon Crown and Demon Flowers to exist.
  • I Cannot Self-Terminate: The last thing he says to you before his death is "Now kill me... or I... shall kill you!"
  • Lightning Bruiser: He's extremely tough, deals a lot of damage with each hit, and surprisingly fast for his size in all forms.
  • Load-Bearing Boss: Inverted. His magic is what's pulling the island down after the Core has been destroyed. Killing him causes the island to stop falling. Played straight when the walls of the room you fight him in start to close together after you beat him.
  • Mad God: Driven insane by the brutal torture his king subjected him to, he now lies within the island as his infinite powers continue to grow, waiting for someone to kill him (while he also tries to kill them). His powers have grown far out of his control and, coupled with his rage, have created a number of dangerous objects around the island as well as constantly pulling the island downwards.
  • Nice Guy: Used to be one. His sincerity and unfailing devotion to helping out his fellow people are what led to his jealous king sentencing him to insanity-inducing torture.
  • Nightmare Face: His last form is a giant ball with his face on it, with the eyes and mouth open, vacant, and filled with screaming red faces. It only gets worse in Halloween Mode.
  • Physical God: He possesses power far beyond normal beings.
  • Sequential Boss: You face his default form, then a giant version of his head, and finally a giant bloody version of his head.
  • Shock and Awe: One of his attacks is to rain down lightning bolts.
  • The Ageless: He cannot die naturally, instead needing someone to kill him.
  • True Final Boss: You only face him at the end of the "True Ending" route.
  • Walking Spoiler
  • Woobie, Destroyer of Worlds



A frenzied Mimiga. He kidnaps Sue in the Egg Corridor. It is implied he was the caretaker of the Dragon Eggs, as the 3DS version reveals the ID Card is his.
  • Degraded Boss: Reappears on The Balcony as a slightly stronger regular enemy, jumping higher and firing off more projectiles. Whether it's actually him, or just another frenzied Mimiga that looks and acts like him is up for debate.


A robotic monster that lives in the Sand Zone. Prior to its appearance, Misery was going to fight the hero. Upon noticing him about to rise from the sand, she leaves dealing with the hero to him.

Pooh Black

A "ghost" that haunts an old clinic in the labyrinth.
  • Kaizo Trap: After killing him, it is still possible to take damage and even die if you touch his remaining bubbles.
  • Palette Swap: Of Balrog, for the most part. There are subtle differences between Balrog's sprite and Pooh Black's.
  • Spell My Name with an "S": His name is sometimes spelled "Puu Black."

Monster X

A large "X" shaped tank that appears in the Labyrinth. Upon defeating it, the player can see who was driving it: A cat.

The Core/Undead Core

A large, multi-segmented monster that lives in the center of the island. Its power keeps the island floating in the air. If it is destroyed, the island will fall. After defeating it the first time, it's about to be destroyed, but Misery and the Doctor arrive and save it. It becomes the Undead Core and is a possible Final Boss.
  • Boss Bonanza: In the second fight, it comes after Misery and the Doctor.
  • Climax Boss: The second fight. If you don't meet the qualifications for the True Ending, though it becomes the Final Boss
  • Disc-One Final Boss: The first fight.
  • Final Boss: Its second fight is this for the Normal ending.
  • Load-Bearing Boss: It is keeping the island floating in the sky. More specifically, it keeps Ballos's magic from making the island fall. Misery is understandably pissed off at you when you almost destroy it for the first time.
  • Nightmare Face: Is The Faceless during it's first battle but when The Doctor possesses it, it gains a few nasty looking faces indicating when it's vulnerable and what attack it's going to use.
  • Underwater Boss Battle: In the first fight, it can raise the water level in the chamber in an attempt to make you drown.


A masked fish that lurks in the Waterway.

The Sisters

A pair of dragons that attack the hero if he decides to pick up the missile upgrade in the destroyed Egg Corridor.

Ma Pignon

A mischievous mushroom that lives in Mimiga Village's graveyard. He gives the hero the Mushroom Badge if he saves Curly and tells him about her amnesia. The badge itself does nothing; the actual cure is Ma Pignon himself. However, he won't go down without a fight.

The Red Demon (a.k.a. The Red Ogre)

A red monster that appears in Last Cave (Hidden). It's implied that this is the creature that Arthur drove away from Mimiga Village.
  • Bonus Boss
  • Chekhov's Gunman: Briefly mentioned earlier in the game.
  • Giant Space Flea from Nowhere: Barely averted, since he gets a mention. His appearance in the Last Cave (Hidden) is rather sudden, though.
  • Palette Swap: Of the generic enemy Droll.
    • The plus version takes it a step further and gives him a headswap as well, making him look more like an actual demon.
  • Spam Attack: Like the Drolls he throws blades, but he throws three at a time, pause, then three more, rinse and repeat.

Heavy Press

A giant Press. It appears as a boss in Sacred Grounds.


A mysterious machine within the Wind Fortress that produces clones of Curly.
  • A.I. Breaker: The Mooks it spawns won't attack you when you stand on the block at the very left.
  • Bonus Boss: Boss of the Wind Fortress.
  • Mook Maker: Curly clones, to be precise.
    • Naked ones, at that, which attack by grappling you



Mimiga Village's second-in-command. He guards the entryway to the graveyard.


A resident of Grasstown. He lost his key, so he asks the hero to find it for him.


A Mimiga who resides in Grasstown. The fireplace in her house contains a passageway that leads to the second half of Grasstown.


A robot that oversees the power room in Grasstown. He helps break Kazuma out of a house.