This is a list of characters from Yume Nikki, with all of the tropes associated with them. Due to the heavily speculative nature of Yume Nikki, be careful about taking the information regarding character personalities and motivation as hard fact.
Beware of unmarked spoilers!
- Ax-Crazy: In the manga her rage over being beaten up and robbed by Uboa causes her to go on a killing spree.
- The Cutie: In the manga, she certainly is. At least at first.
- Conditioned to Accept Horror: She goes into her Acid-Trip Dream Land, faces countless Eldritch Abominations like Uboa, can have her head completely removed from her body, and has the same expression throughout all of it.
- Creepy Child/Teens Are Monsters: Possibly depending on how you play, if you interpret her to be a child or in her teens.
- Driven to Suicide: After collecting all 24 Effects, Madotsuki jumps off of her apartment balcony.
- Eyes Always Shut: The only exceptions being a few of her Effects. Subverted in Dream Diary.
- Gamer Chick: She's familiar enough with JRPGs to dream about them, and a Famicom in her room seems to be her only form of entertainment.
- Knife Nut: One common interpretation of Madotsuki, since the only way to get a different reaction out of many of the dream residents is to stab them to death.
- Heroic Mime: Downplayed. While there isn't any text dialogue in-game, Madotsuki does have sound effects for if she can't perform a certain action ("Dame" and "Muri").
- Hikikomori: One of the few traits everyone can agree on. Madotsuki would rather die than leave her room through the front door. Subverted in Dream Diary, in which she finally decides to leave her room at the end.
- Pinch Me: Just about the only way to get her to wake up; fortunately, it allows her to escape dangerous situations such as the Toriningens' otherwise inescapable rooms.
- Sleepyhead: Madotsuki doesn't do much aside from play NASU and sleep, and when she sleeps, she doesn't wake up unless she pinches her cheek in the dream world or encounters something particularly traumatic.
- Gotta Catch 'Em All: The main goal of the game.
- Surreal Symbolic Heads: Many of the Effects change something about Madotsuki's head.
- Baleful Polymorph: Turns Madotsuki into a frog.
- Overshadowed by Awesome: The Frog Effect lets Madotsuki walk through water at normal speed! ... Except the Bike does the same thing AND provides a speed bonus outside of water, and there's only one section of the game where you'll actually be in water.
- Ability Required to Proceed: Either the Umbrella or the Yuki-onna effect are required to douse the flames leading to the Poo Hair effect.
- All Your Powers Combined: Switching to a different Effect allows Madotsuki to use another Effect while it's still raining. It lets Madotsuki use the Oni effect's thunder clap anywhere the player wants.
- Weather Manipulation: Makes it rain anywhere in the dream world. Removing it also causes all rain to stop, even the rain in the Dense Woods.
Hat & Scarf
- All Your Powers Combined: Using the Hat and Scarf while it's snowing enables Madotsuki to become a snowman.
- Boring, but Practical: Using the Hat and Scarf to become a snowman and going to the Block World enables Madotsuki to stay with Mafurako after the latter teleports away after interacting with her, shortening the time the player has to spend to get to the White Desert.
Snow Woman (Yuki-onna)
- Ability Required to Proceed: Either the Umbrella or the Snow Woman effect are required to douse the flames leading to the Poo Hair effect.
- All Your Powers Combined: Switching to a different Effect allows Madotsuki to use another Effect while it's still snowing.
- Weather Manipulation: Makes it snow anywhere in the dream world. Unlike the Umbrella, however, snow continues to fall in the Snow World after it's been unequipped.
- Youkai: Based off of Yuki-onna from Japanese mythology.
- Absurdly Sharp Blade: It's capable of at least injuring most of the characters in the game, and killing many of that group.
- Boring, but Practical: It can be used to remove characters blocking Madotsuki's path, as well as for accessing certain areas.
- Video Game Cruelty Potential: Madotsuki can kill many characters in the dream for money with the Kitchen Knife effect, and injure almost every character in the game that she can reach.
- Video Game Cruelty Punishment: Stabbing a Toriningen will cause it to go insane, and stabbing certain objects and characters will cause bad things to happen.
Eye Palm (Medamaude)
- Boring, but Practical: Well, as boring as having your head replaced with an eyeball inside of a giant hand can be. It teleports Madotsuki back to the Nexus when in the dream world.
- Escape Rope: Functions as this, teleporting Madotsuki back to the Nexus from anywhere in the dream world. Even in Uboa's Trap and the enclosed spaces the Torinigen send Madotsuki to.
- Karma Houdini: Get caught by a Toriningen after stabbing it? Just use the Eye Palm and you can get away from that area without having to wake up!
- Cosmetic Award: Not counting the Frog Effect, this is the first Effect in the player's list that is completely useless.
- Fat Girl: Turns Madotsuki into one of these.
- Boring, but Practical: Can be used to access Mars-san's area, as well as certain rooms in the Sewer Tunnel.
- Lilliputians: A more accurate name for this effect.
- Pint-Sized Kid: It makes Madotsuki small enough to fit through certain gaps.
- Cosmetic Award: There's no point to collecting the Flute Effect besides completion.
- Impractical Musical Instrument Skills: Madotsuki plays just fine, but there's no uses for the Flute.
- Cosmetic Award: There's no point to collecting the Neon Effect besides completion.
- Interface Screw: Changes the screen to various colors when the action button is equipped.
- The Blank: Given that it's based on the Nopperabou.
- Cosmetic Award: There's no point to collecting the Nopperabou Effect besides completion.
- Youkai: Similar to the Snow Woman, it's based off of the Nopperabou.
- Cosmetic Award: There's no point to collecting the Severed Head Effect besides completion.
- Didn't Need Those Anyway!: Madotsuki is reduced to just a head, nothing else. Given that this is All Just a Dream, this trope is actually justified.
- Off with His Head!: Obviously.
- Overshadowed by Awesome: You can use this Effect to view Closet Madotsuki in the Checkered Tile Path, since Madotsuki is too big to do it otherwise. Except you can also do it with the Midget Effect, and the Severed Head Effect reduces Madotsuki's movement speed to a crawl and Madotsuki can't pinch herself awake.
- And Your Reward Is Clothes: If a towel is considered "clothing."
- Cosmetic Award: There's no point to collecting the Towel Effect besides completion.
- Cat Girl: Turns Madotsuki into one of these.
- Small, Annoying Creature: In-universe. Several characters, such as the "passengers" on the Train Car, o-Man and e-Man in the Mall, and the Witches at Witches' Island, display annoyed or angry reactions to the effect's meow.
- Thou Shalt Not Kill: Enables Madotsuki to get past characters that would otherwise require her to kill them with the Kitchen Knife Effect.
- Weirdness Magnet: Quite literally, since using the Action button draws characters in the dream world to Madotsuki.
- Bird People: What their species name translates to.
- Half-Human Hybrids: Their species name literally means "bird person".
- Mook Bouncer: The crazy Toriningen always warp you to an inescapable area. Stabbing a nice Toriningen will make her into one of these.
- Super Speed: The Candle World Toriningen, who moves 8x as fast as Madotsuki. There's no way to outrun it except turning invisible and exploiting a glitch that lets the player run at the same pace as it.
- Turns Red: Stabbing one sane Toriningen will cause ALL Toriningen to go insane.
- Video Game Cruelty Punishment: Stabbing a Toriningen will cause them to chase Madotsuki and put her in an enclosed space away from everything else.
A quiet girl who lives in a house located in the Pink Sea, which can be accessed through diving into a pool in an igloo in the Snow World. Upon flicking the light switch in her room, there's a 1/64 chance she'll turn into Uboa.
- Adaptation Expansion: In the game, she's just another dream resident that aimlessly wanders her room. In the manga, she's a character in her own right.
- Ambiguously Human: She looks like a normal human girl, but then there's the fact she lives in a vacant area, shows no visible reaction to meeting another human in a world as strange as Dream Land and can turn into a horrifying blob-like creature if you turn off the lights in her room.
- Ambiguous Situation: Why is she the only dream resident who looks like an ordinary human? And what exactly is the deal with her turning into Uboa?
- Alas, Poor Villain: She's a complete jerk in the manga, but after learning about her backstory, it's hard not to understand where she's coming from.
- Eldritch Location: Uboa's Trap World, accessible only by interacting with Uboa, is a nightmarish otherworld with nobody but Uboa itself and the "Bloody Touching Monster" in the distance to keep Madotsuki company. It's also a dead end; the only way to leave is to pinch Madotsuki awake or use the Eye Palm effect.
- Foil: To Madostuki. They're both human girls living alone in a single room that they refuse to leave under any circumstances. But while Madotsuki mentally leaves her room to explore the dream world, Poniko doesn't leave hers at all and might be just a figment of Madotsuki's imagination.
- The manga takes this a step further. Poniko is a human girl trapped in the same dream world as Madotsuki, but while the latter is a somewhat naive newcomer who is friendly and optimistic, Poniko has figured out the purpose and nature of the world they're trapped in long ago and has absolutely no qualms about using violence, theft and blackmail to escape it.
- Icy Blue Eyes: Sports a pair of these.
- Jump Scare: When Uboa is summoned, the screen suddenly flashes, the room starts shaking, and mocking faces appear on the furniture.
- Karmic Death: In the manga, Poniko is killed by Madotsuki, after purposely corrupting her.
- Meaningful Name: Uboa's name is a corruption of "uhoa", a Japanese scream note . However, the syllables in the creature's name don't sound right together in Japanese, not unlike "Cthulhu" in English.
- Morphic Resonance: In the manga, Uboa grows features similar to Poniko's ponytail and arms.
- Not So Stoic: Poniko will be drawn to Madotsuki if she wears the Cat effect or run away from her when the Knife effect is equipped. Even Uboa moves toward Cat Madotsuki, which is the only way to make it move at all.
- In the manga, seeing Madotsuki's corrupted form unnerves her and when Madotsuki grabs her she flips out, hammering her hands with her fists and demanding to be let go.
- The Stoic: She doesn't react to Madotsuki at all, even when directly interacted with, and always wears a slightly annoyed expression on her face.
- Dream People: While the "things" are also people, there are a few strange "humans" scattered throughout the dream world, such as Monoe, Monoko, Mafurako, and Poniko. Faceless Masses also appear in the Mall and the Sky Garden.
- Non-Malicious Monster: Despite their sometimes threatening appearances, the vast majority of "monsters" simply mind their own business. The sole exceptions are Uboa and the Toriningen.
- Our Monsters Are Weird: What else would inhabit a creepy and surreal dream world?
- The Quiet One: None of the dream residents speak except to scream if Madotsuki kills them with the Kitchen Knife effect, with the only exception being the lizard people in the Famicom World and any sound effects the player can draw out by interacting with certain characters.