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Characters / Cave Story

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Main Characters


The Player Character. An amnesiac young man who awakes in a small cave in the depths of a strange island. He eventually discovers that he's really a scout robot from the surface.


    Curly Brace 

Mimiga Ally

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

    Sue Sakamoto 

Looks up to her brother
Click here to see spoilers 
A fiery young girl being pursued by the Doctor's henchmen.


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


Misery's punching bag
Click here to see his whole body 
An anthropomorphic bar of soap under the command of the Doctor.
  • Affably Evil: Despite being on the villains' side, Balrog is very cordial to the player. In their first encounter, if the player tells Balrog they don't want to fight him, Balrog will actually listen to them and leave them alone. Balrog does fight the player a few other times, but only because he has to. This is a clue that he is Forced into Evil.
  • Bait-and-Switch Boss: After you turn on the power on in Grasstown/Bushlands, the robot Malco prepares to attack you. Then Balrog shows up and crushes him, commencing a boss fight.
  • Bewitched Amphibian: On the third encounter with him, he gets transformed by Misery into Balfrog.
  • Boisterous Bruiser: He's an all-around fun loving dude with a generally pleasant and lax attitude, who takes to his every action with a lot of enthusiasm.
  • Bullfight Boss: During the first fight with him, all he does is rush you. He's easy to dodge if you know what you're doing, but if you don't, he can easily kill you with his Super Strength. Averted with his later boss fights where he learns new attacks.
  • The Brute: He's the Doctor's strongman.
  • Catchphrase: Huzzah! (or "Oh yeah!" in commercial English versions)
  • The Cavalry: In the Best ending, he saves Quote and Curly Brace from Ballos' Seal Chamber just in the nick of time.
  • Cephalothorax: Balrog's face dominates his entire torso. In fact, it's such a large face that only half of it is depicted in his speech bubble portraits.
  • Defeat Means Friendship: You must fight him multiple times. However, after the Doctor is defeated, he immediately reforms. As it turns out, he never even wanted to follow the Doctor's plans: he just had no choice.
  • Dynamic Entry: His usual method of entering a building is to smash through the wall or ceiling while yelling his catchphrase.
  • Heel–Face Turn: In the good ending, he and Misery are freed from the Doctor's influence, which leads to Balrog pulling a Big Damn Heroes to save Quote and Curly from Ballos' Seal Chamber as it closes in on them.
  • Flying Brick: Almost literally. He's a sentient brick of soap who can take an utterly massive amount of damage and keep on going, and he can fly at appreciable speed.
  • Forced into Evil: Turns out there's a reason for his villainous behavior: he's forced to obey whoever wears the Demon Crown. When freed, he quickly pulls a Heel–Face Turn.
  • Gentle Giant: This guy twists the trope in knots. Under normal circumstances, Balrog is nice to a fault. However, he is cursed to be subservient to whoever wears the Demon Crown. As a result, he will do things that are decidedly unpleasant if and when he is ordered to. However, he is not cursed to serve Misery, who - like him - must also serve the wearer of the crown. Misery generally mistreats him, but his childlike personality prevents any sort of retaliation, to the point where he's practically a Butt-Monkey. In the credits, he is actually credited as "Misery's Punching Bag".
  • Incoming Ham: He always yells Huzzah! before making an entrance.
  • Just Following Orders: Unlike most people who invoke this trope, Balrog physically cannot resist the orders he's under, as he is being magically compelled to follow them. The moment he is free from that magic, he quits evil entirely.
  • Living Weapon: He is one for whoever wears the Demon Crown.
  • Macross Missile Massacre: During the final fight with him, he's wielding a missile launcher.
  • Morphic Resonance: In his giant frog form, his eyes don't change much except for their pupils, which are slightly narrower, and he has pink spots under his eyes where the stripes would be in his normal form. And his forelegs are the same color as his arms do in his normal form.
  • Names to Run Away from Really Fast: His name sounds worthy of Demon Lords and Archdevils.
  • Psychopathic Manchild: The disconnect between the almost child-like way he carries himself and the monstrous things he does during the story is astonishing. For one thing, during the Sand Zone part of the game you can come back to Jenka's house after getting the last dog for her and find the rest of them noticeably absent and Balrog gloating about having the key to the warehouse. This could be seen as him killing her dogs as an interrogation method to make her give him the keys. For another he force-feeds Toroko red flowers, basically killing her. The real kicker is, he actually isn't psychopathic. The Demon Crown has him under a spell that compels him to do as he is ordered. Once the spell is broken, he's basically a harmless goofball.
  • Recurring Boss: You will fight him four times throughout the first half of the game.
  • Skippable Boss: The first fight with Balrog can be skipped wholesale by answering "no" when he asks if you're going to fight him.
  • Stone Wall: He isn't particularly fast, and his attacks are pretty weak, but considering how often you fight him and how much punishment he can take, he's an absolute brick.
  • Super Strength: He can fling gigantic, several-hundred ton boulder through the air.
  • Sympathetic Sentient Weapon: It's not actually his fault that he keeps trying to kill you. He's under a curse.


The Doctor's servant
A young looking witch under the command of the Doctor.

    The Doctor 

The power-snatching betrayer
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.


Nice and Courageous
Click here to see her original design 
A young Mimiga and Sue's friend.

    Kazuma Sakamoto 

Sometimes reliable brother
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.
  • Didn't Think This Through: Played for Laughs when he starts the ignition of a motorcycle in the Grasstown/Bushlands with Professor Booster as passenger... whereupon he realizes too late that he has no idea how to control the motorcycle. It goes about as well as you'd think it would, with the exception of him and the professor surviving. Not so much the poor motorcycle.
  • 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 shelter, calling his little sister for help.
  • Eyes Always Shut: His eyes are always closed in both in his overworld sprite and portrait.
  • Hollywood Hacking: He's the one who finds the correct password to hatch a Sky Dragon egg.
  • Non-Action Guy: To extreme levels. He makes no effort to fight at all, and demonstrates that he is the most cowardly person on the expedition by far.
  • Pointless Band-Aid: Has one on his left cheek. It may not be pointless - he probably got it from Sue.


Keeper of the Sand Zone
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 after he went insane. That must have required really strong magic.


The Mimiga-like coward engineer
A cowardly engineer who was transformed into a Mimiga.
  • Baleful Polymorph: He's a human who was transformed into a Mimiga by Misery.
  • Cowardly Lion: He eventually overcomes his fear to help Momorin construct the escape rocket.
  • Mr. Fixit: He's an engineer.

    Professor Booster 

Sue's grandfather figure
The former research party's technician.

    Momorin Sakamoto 

Sue's mom
The mother of Sue and Kazuma.
  • Badass Normal: She survives being thrown off the island by the Doctor. Then, after climing back up, she personally organizes the resistance against him.
  • Deadpan Snarker: Momorin's commentary on the Doctor trying to throw her off the island once she's done her job for him is to dryly retort about how "chivalry is dead, let me tell you,"note  Sue definitely got a bit of her attitude from Momorin.
  • Mama Wolf: Not that she could personally do anything about it herself, but Momorin does take particular offense to the Doctor taking Sue with intent to feed her red flowers with the rest of the Mimiga. Consequently, she near-immediately sends the One-Man Army that is Quote right to the Doctor's doorstep.
  • You Have Outlived Your Usefulness: The Doctor had Momorin tossed off the side of the island not long after the group's arrival, once she confirmed the existence and location of the red flowers. Somehow she survived just fine and snuck her way into the Plantation anyway, helping the player directly in reaching the Doctor as a bit of payback.

    Tetsuzou Kamadani (Unmarked Spoilers

The Hermit Gunsmith
The man who made the Polar Star.

    Ballos (Unmarked Spoilers
Click here to see his second form 
Click here to see his final form 

Jenka's remorseful younger brother

Once Jenka's kind and loving brother, now a mad sorcerer trapped in the depths of the island.
  • Ambidextrous Sprite: Averted. His eyes keep their 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.
  • Anti-Villain: Of the Woobie and Villain in-name only type. All he ever wanted to do was to do good. Now, that he physically cannot do good anymore, he only wants to die. He still seems to possess some sense of justice: when his niece forced him to make the Demon Crown for her use, he responded by cursing her so that she would instead be the slave of whoever wore it for eternity. Considering what the Demon Crown can do, that's hardly a case of Disproportionate Retribution.
  • Badass Longcoat: He 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 Good Sucks: He was tortured by his jealous king because the people loved him too much. The rest is history.
  • 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.
  • Body Motifs: His right eye is red, and there are two eyes on his robe, both of which are red. With the exception of the Red Flowers, every single thing that is connected to his out-of-control magic has one or more red eyes.
  • Death Seeker: He waits for the person who can finally kill him and subdue his powers. It sure doesn't stop him from putting up a fight, though.
  • Driven to Villainy: He didn't want any of this. He didn't work towards it in any way. It was thrust upon him by a self-important Jerkass of a king who was jealous of his popularity.
  • Evil Is Burning Hot: His hometown erupted in flames the moment he lost control. After his death, a bunch of unknown voices call out statements such as "It's so hot..."
  • Evil Is Visceral: In his final form, his eyes and mouth are filled with red stuff that seems like blood, except it takes the form of screaming faces, most likely all the people he's killed.
  • 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!"
  • Jerkass Genie: His niece found him and pressured him into making her a crown imbued with his powers. The caveat to that? She's bound to the crown and whoever wears it; she doesn't get to wear it herself. As horrible as that fate is, she arguably deserved it.
  • 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: The walls of the room you fight him in start to close together after you beat him. As far as the plot, though, this trope is inverted: his magic is what's pulling the island down after the Core has been destroyed. Killing him causes the island to stop falling.
  • 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: He used to be a nice guy. He isn't anymore.
  • No Good Deed Goes Unpunished: He never did anything wrong. His sincerity and unfailing devotion to helping his fellow people are what led to his jealous king sentencing him to insanity-inducing torture. Everything else that happened was an uncontrollable side-effect of that insanity: the fiery blast that killed his home and family wasn't his fault, the Red Flowers are manifestations of his rampaging magic that leak out beyond his influence, and Misery was the one who forced him to make the Demon Crown, which he has no control over.
  • 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.
  • 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: The fact that he exists is a huge spoiler in of itself and you only hear about him if you're on the route to the Golden Ending. Nothing else about him is revealed until the final dungeon.
  • Woobie, Destroyer of Worlds: Sure, he might have caused most of the trouble in the game's history, but it's hard not to feel sorry for him after you hear what he's been through.



Rabid Mimiga who kidnapped Sue
Click here to see his whole body 

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.


Machine-monster that lurks in the sand
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.

    Puu Black 

Ghost in the clinic
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 Puu Black's.
  • Spell My Name with an "S": His name is spelled "Pooh Black" in the Aeon Genesis Translation.

    Monster X 

Big boss in the labyrinth
Click here to see its true form 
A large "X" shaped tank that appears in the Labyrinth.

    The Core 

Heart of the island
Click here to see spoilers 
A large, multi-segmented monster that lives in the center of the island.


Big fish in the island's artery
A masked fish that lurks in the Waterway.

    The Sisters 

Twin dragon surprise attackers
A pair of dragons that attack Quote if he decides to pick up the missile upgrade in the destroyed Egg Corridor.

    Ma Pignon 

A tasty mushroom
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.
  • Doppelgänger Attack: One of its attacks involves it jumping into the ceiling and summoning a number of clones. Those are weaker than the real one, and can be destroyed.
  • Jerkass: To put it bluntly, you probably won't feel sorry about having to feed it to Curly due to how obnoxious it is.
  • Let's Meet the Meat: The "I want to live!" kind.
  • Route Boss: Required in order to get the best ending.
  • Troll: Before fighting it, you have to get the Mushroom Badge from it by answering a series of questions designed to confuse you. Then, you find out it has no use. Talking to it again will initiate the bossfight.

    The Red Ogre/The Red Demon 

True heroes meet the...
A red monster that appears in Last Cave (Hidden). It's implied that this is the creature that Arthur drove away from Mimiga Village.
  • Chekhov's Gunman: Briefly mentioned by Jack in an optional dialogue in the Assembly Hall earlier in the game.
  • Giant Space Flea from Nowhere: Barely averted, since he gets a optional mention. His appearance in the Last Cave (Hidden) is rather sudden, though.
  • Oni: What his design is based off of. His original Japanese name is even Akaoni (red oni).
  • Palette Swap: Of the generic enemy Droll.
    • The Plus version takes it a step further and gives him a Head Swap as well, making him look more like an actual demon.
  • Route Boss: Only present in Last Cave (Hidden), only accessed if the player has the Booster 2.0.
  • Spam Attack: Like the Drolls he throws blades, but he throws three at a time, pause, then three more, rinse and repeat.
  • Taken for Granite: It turns into stone when defeated.

    Heavy Press 

The swollen mech
A giant Press. It appears as a boss at the end of Sacred Grounds.
  • Boss Bonanza: With Ballos.
  • Flunky Boss: Its only direct attack is its lightning strike. During its boss battle, two Rollings appear, and Butes constantly spawn from the sides of the room.
  • Kaizo Trap: Heavy Press falls through the floor after being killed. The punishment for standing underneath it when it does so is instant death. That is, unless you abuse Mercy Invincibility via one of his minions.
  • One-Hit Kill: If you don't step out of the way as it falls through the floor after defeat, you will die instantly.
  • King Mook: It's a basically larger version of the Presses seen throughout the game.
  • Pre-Final Boss: Penultimate boss of the true ending, as well as the game as a whole.
  • Route Boss: Can be fought only in the True Ending route.
  • Shock and Awe: It has a lightning attack which strikes directly below it that it uses every so often.
  • Stationary Boss: It only ever moves after its health bar is depleted to crash through the floor. The main threat in its boss fight is the enemies present.

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.
  • Mook Maker: Curly clones, to be precise. Naked ones, at that, which attack by grappling you.
  • Optional Boss: Boss of the Wind Fortress, which itself is only unlockable in Plus-based versions.



Mimiga Village's second-in-command. He guards the entryway to the graveyard.
  • Number Two: He identifies himself as the number-two of the village. When spoken to, he speaks the clearest and most directly of all the Mimiga in the game.
  • Sole Survivor: Out of the Jack/Toroko/King trio, it's implied that he's the only one who didn't die during the game.
  • What Happened to the Mouse?: The last time he can be seen is in a Plantation prison. He disappears completely without a word thereafter.


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


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


Power Supply Bot
A robot that oversees a power room. He helps break Kazuma out of a shelter.
  • Because You Were Nice to Me: Despite his initial aggression, Malco helps Quote after the latter helps him out.
  • MacGyvering: He can make a bomb out of charcoal, gum, and jellyfish juice.
  • Robo Speak: In the Aeon Genesis translation he always speaks in ALL-CAPS.
  • Tin-Can Robot: He certainly gets crushed like one thanks to Balrog.