Due to lengthy periods between releases and the prevalence of Late Arrival Spoilers, spoilers from installments before 2010 may be unmarked. Read at your own risk.
Many villains in the series are working together to achieve some sort of grand goal. However, some people just want to watch the world(s) burn.
Voiced by: Mamoru Miyano (Japanese), David Gallagher (English)
Appearances: Chain of Memories | III
A Replica of Riku created by Vexen and used as a tool by the Organization. He's mistaken for the real Riku by Sora when he's sent against him, and appears to attack the real Riku as well. He's ultimately destroyed at the real Riku's hands.
- Always Someone Better: His motivation for defeating Riku.
- Artificial Human: He's a Replica of Riku made by Vexen.
- Become a Real Boy: His entire motivation is to prove he's a real person, if not become one.
- Berserk Button: He has two — getting anywhere near Naminé (Sora's storyline) and being called a "fake" (Reverse/Rebirth).
- Beta Test Baddie: Once he learns he's a copy of Riku, he doesn't take it very well.""I'm me" he says. Must be nice, being real. A fake like me could never get away with saying something like that! That's right! I'm a phony! A fake! The way I look, the way I feel, everything I remember! And even this newfound power! I thought that by gaining new strength, I could finally be someone! Someone who's not at all you! But nothing changes. I'm still just empty! Everything about me is borrowed. As long as you're around, I'll never be anything better than a shadow!"
- Break the Haughty: He's pretty arrogant when he first appears chronologically. Larxene puts him in his place in an instant.
- Chekhov's Gunman: After finishing Chain of Memories, he dies and is forgotten... until 358/2 Days came out, and it turns out Xion is a Replica just like him. And then in III it's revealed that while his body was destroyed his heart survived in the realm of darkness, until he was able to find the real Riku and merge with him.
- Cloning Blues: He's Riku's copy given fake memories, and is tormented by the revelation that his life is a lie.
- Cool Sword: His copy of the Soul Eater.
- Cosmic Plaything: He spends the entirety of Chain of Memories being jerked in different directions by the Organization, one member at a time.
- Fake Memories: Throughout Sora's storyline, since Vexen had him implanted with the memories Naminé was force-feeding Sora to see what would come of it.
- Go Out with a Smile: Dies smiling. Twice.
- HeelFace Turn: At least during Sora's storyline. Though he realizes his memories of Naminé aren't real, they're all he has, so he keeps true to them by protecting her from the Organization.
- HeelFace Door-Slam: In Riku's story, Axel goads him into attacking the real Riku after Marluxia's death. It spells his defeat.
- Heroic Sacrifice: In the climax of III, his immaterial heart forces Dark Riku (which has his heart from the past) out of the replica that Dark Riku was using to stay anchored in the present. When Riku asks Riku Replica to enter the now empty replica so he can stay, Riku Replica chooses to fade away instead so that the empty replica can be used to give Naminé a body.
- Hot-Blooded: Maybe even moreso than Riku in Kingdom Hearts, and that's saying something. However, this is justified by the fact that Vexen doesn't really understand hearts, not having one himself, and by the fact that Larxene manipulates him into it the entire time.
- I Want My Beloved to Be Happy: Instead of using the empty replica body to save himself, he tells Riku to use it to give Naminé a body instead.
- Jumping Off the Slippery Slope: More like pushed off by Axel. He goes to fight Riku to prove which of them is superior after all.
- Killed Off for Real: Zig-zagged. In a series where several recurring characters suffer from losing their hearts, which Word of God states is different from death since they can regain their hearts, the Replica is one of the few characters confirmed to have died. However, he is referred to as having "seemingly" died in Dream Drop Distance's story recaps. III reveals that his heart survived in the realm of darkness, though he then dies for good at the end of that game.
- Mirror Match: During Reverse/Rebirth.
- No Place for Me There: After Marluxia is defeated he essentially says this to Sora.
- Obi-Wan Moment: He's rather quiet and tranquil as he dies.
- Only Known by Their Nickname: "Riku Replica" is all we have to use for him.
- The Rival: Being based on Riku, he serves as one to Sora, and the real Riku.
- Shadow Archetype:
- Is an obvious one to Riku; the Replica dives deeper into darkness without a care and lets his emotions drive him, and it gets him killed.
- Also is one to Xion, despite them being in different games and never meeting. They are both replicas created by the organization, and while he is a replica of Riku, Xion is an imperfect replica of Sora who is identical to Kairi. They both undergo existential crises when they discover what they are and desire to become their own people, but while Xion ultimately makes peace with what she is and orchestrates her own destruction to prevent the bad guys from winning, Riku's replica becomes highly embittered by the truth and is sent to his death through manipulation of his desire to assert his individuality. Their life situations are also different; Riku's replica was utterly alone in his struggle. Xion at the very least, knew she had two friends who cared about her in Roxas and Axel.
- Spared by the Adaptation: In the manga, he survived, but was then destroyed in the ''II'' adaptation.
- Talking to Himself: Invoked. Quite literally happens any time he and the real Riku face each other.
- Teleport Spam: If you hated Riku's Dark Aura back in the first game, you will loathe this guy.
- Tragic Villain: The poor guy had a bunch of fake memories planted in him to make him do whatever the Organization wanted, and eventually didn't even have those.
- The Unfavorite: The 358/2 Days secret reports reveal that the Riku Replica and Xion were part of the same replica program, but he was somehow deemed inferior to Xion which is why he was relegated to the role he played, rather than be planted to live among the Organization the way Xion was.
- Yandere: For Naminé. The scary thing is that the Organization's plan basically amounted to Sora becoming just as crazy as he concerning protecting Naminé.
Voiced by: Toshiyuki Morikawa (Japanese), Lance Bass (I, English), George Newbern (II, English)
Appearances: I | II | Birth by Sleep
The famous Final Fantasy VII villain appears as a fiendishly hard optional boss in both I and II. In the latter, there's a bit of a subplot with him and Cloud — in the former, Cloud mentions that he's "looking for someone," but the two only interact in a cut-scene added to the Final Mix.
- Affably Evil: He remains calm and polite even when expressing his intent to slay Sora and Cloud.
- Arch-Enemy: Cloud's, naturally, to the extent that he actively seeks out Cloud midway through II for no reason other than to taunt him. His skirmishes with Sora and Tifa in the same game were more impersonal than malicious, making this Sephiroth simply "antagonistic" than outright "evil."
- Ascended Extra: His role in II is slightly larger than his role in the first game, even factoring into the main plot for a brief period of time, and actually getting some characterization.
- Badass Longcoat: Of the No Shirt, Long Jacket variety.
- The Battle Didn't Count: Immediately after Sora defeats him in II, Sephiroth's reaction to being bested is not to show any signs of being gravely wounded (as any other boss would), but brushing himself off and noting that only Cloud can defeat him.
- BFS: Wouldn't be Masamune if we could fit it in the picture. That sucker's seven feet, as usual.
- Bishōnen: Lacks the textbook personality, although when he was voiced by Lance Bass, his combat dialogue did show hints of it.
- Blade Spam: His Flash technique in KHII, of the "Simultaneous Blade Spam" variety. Sephiroth dashes past Sora, and if you don't use the Block Reaction Command, Sora instantly is bombarded with about 7-9 slashes.
- Bonus Boss: In I and II, challenging him is entirely optional. He's one of the most difficult battles in the entire game, though the rewards are nice.
- Casting a Shadow: A few of his attacks in both games, as well as the Battle Aura he adopts in later phases of his boss battle.
- Colony Drop: His most powerful attacks involve meteors, naturally, though they're on a Dissidia scale rather than the planet-crushing one from VII.
- Composite Character: This version of Sephiroth seems to be a mix of his depictions in Advent Children and Crisis Core. While he definitely has powerful antagonism and rival with Cloud as emphasized in Advent Children, his more Ax-Crazy tendencies shown in VII are absent. His overall Noble Demon personality is also a bit closer to his Nice Guy depiction in Crisis Core, before his Sanity Slippage.
- The Computer Is a Cheating Bastard: In II, he begins his first attack while the pre-battle intro poses are still being done. Further, it can only be avoided by Reaction Commands or Reflect, and you have a smaller window to do this than in the rest of the fight since he starts it earlier. A lower-level player can find themselves wiped out in one hit before they even realized the fight had begun.
- Damage-Sponge Boss: As to be expected from a Bonus Boss, but it's to an absolutely ridiculous level, especially in the first game. The game shows a maximum of five health bars. Sephiroth has six. As a result, it doesn't even look like your attacks are damaging him, even though they are.
- Duel Boss: The fights with Sephiroth in Kingdom Hearts I & II have Sora confronting him alone, without Donald or Goofy.
- Enemy Without: It is heavily implied, if not outright stated, that he's the physical embodiment of Cloud's own darkness rather than the "real" Sephiroth. To further emphasize this point, Sephiroth has the exact same facial features as Cloud, even sporting Cloud's blue eyes instead of the green eyes the Sephiroth of FFVII possesses.
- Evil VS Evil: The Heartless and Nobodies are nothing more than very minor obstacles standing between him and Cloud.
- HP to 1: His signature Heartless Angel attack, with an MP drain effect to boot.
- Iaijutsu Practitioner: His fighting style in I invokes this, although with Masamune's size he doesn't sheath it so much as just hold it by the blade and let go when he needs to swing.
- Leitmotif: One-Winged Angel, like in Final Fantasy VII.
- Mr. Fanservice: Come on, it's Sephiroth. He's a well-built long-haired Bishonen in black leather as usual.
- Never Say "Die": Pseudo-example, his declaration in the first game of "I will lead you to the Promised Land" becomes more threatening when you remember that most interpretations of the "Promised Land" in VII were that it was The Lifestream.
- One-Man Army: Carves through a horde of Heartless like cake while Leon and Cloud are plain outnumbered - just to taunt Cloud and teleport away. Enemy Mine isn't a philosophy of his.
- One-Winged Angel: Notably averted, despite being the Trope Namer; Sephiroth has exactly one form, though it's all he needs to be a challenge. If you're being literal, he has one wing in the first game and three in the second - on the other hand, the hip-wings do make an interesting callback to his actual One-Winged Angel form.
- Only I Can Kill Him: Inverted; Cloud is the only one able to destroy him. Even after Sora gives him a particularly long beating, Sephiroth just brushes himself off, compliments his skill, and invokes the trope.
- O.O.C. Is Serious Business: Shouts "STOP!" when Cloud begins to channel light energy. Given Cloud's darkness is what keeps him from dying for good, it's understandable that Cloud embracing the power of light, therefore gaining the power to truly destroy Sephiroth would give him a scare.
- Perpetual Molt: Every time he teleports, he leaves behind a few black feathers, and he sheds a few during his combos in II.
- Playing with Fire: Just because, though it's possibly an application of Evil Is Burning Hot. Alternately, it could be a reference to his infamous Super Nova attack.
- Power Echoes: He has a very heavy echoing reverb to his voice in I but it makes it difficult to understand what's he saying in battle.
- Punch-Clock Villain: Sephiroth's only interests are really in tormenting Cloud, otherwise he stays out of the conflicts of the real villains and has no interest in it. He challenges Sora to a duel in II to see if the keyblade would choose him to be its new master if he won. After essentially fighting to a draw and coming to a conclusion that only Cloud can actually kill him, he decides to no longer fight Sora.
- Rapunzel Hair: His hair almost reaches to his knees.
- Red and Black and Evil All Over: His normal black coat has red color added to give this trope.
- A Sinister Clue: Subverted; he wields the Masamune with his right hand in the first game, but his left in the second.
- The Stoic: Almost never raises his voice or even changes his mood.
- Teleport Spam: He constantly teleports in flashes of dark light.
- Villainous Breakdown: Gameplay example; in both games, his fighting style becomes more frantic the less HP he has. When the battle starts, he fights by slowly walking towards Sora and swinging Masamune when it will hit, sticking to relatively simple attacks (and Flash in II). After he's taken a bit of damage, he starts running, hits a bit harder, and starts using Heartless Angel. A few more hits, and then he gets serious; he starts flying and dashing around, uses Meteor, and attacks much more rapidly.
- Story-wise, he freaks out when Cloud starts using the power of light.
- Villain Respect: Right after Sora bests him, Sephiroth dusts himself off and compliments Sora's skills.
- White Hair, Black Heart: A rare instance in this series where a white-haired evil character is not a Xehanort.
- Winged Humanoid: He perpetually has his wing showing.
- Worthy Opponent: Considers Cloud to be one.
- You Kill It, You Bought It: The reason he challenges Sora to a fight in II. Upon seeing the Keyblade, he wonders aloud if the legendary weapon "won't change its mind" after he kills Sora.
The Hostile Program
A virus program created by the MCP and released by Sark to cause chaos in both Radiant Gardens and Space Paranoids to deal with Sora and Tron. Despite its resemblance to the Heartless, it is not one itself.
- Canon Foreigner: It is one of the few characters exclusive to a Disney world that is not a Heartless or Disney character.
- Frickin' Laser Beams: Sweeps the area with these.
- "Get Back Here!" Boss: Spends a lot of the battle moving to different points in the area, firing lasers.
- Game-Breaking Bug: If playing the PS2 version of II on backwards compatible PS3 consoles, it could become invincible (and thus impossible to defeat) due to a bug in the emulator. A patch was released to fix this.
- Hoist by His Own Petard: In an odd variation, when the Program is hit, it drops cluster orbs, which don't defeat it, but can be used to cripple its movement and make it easier to hit. The Program does this through no fault of its own, so it isn't a Tactical Suicide Boss.
A mechanical creature intended to be a playmate for Lock, Shock, and Barrel. It's a creation of Dr. Finklestein's like Sally, but lacks a Heart like she has. To fill this void, it steals Christmas presents, believing that the joy from a gift from ones heart will help this problem.
- Alas, Poor Villain: Upon learning of its motives, Sora remarks that he pities it.
- Body Horror: Its pieces can be taken off and put together again.
- Canon Foreigner: The character is original to the game; however, its design is based on props used in The Nightmare Before Christmas.
- Decapitated Army: Each part can move on its own, but the creatures torso needs to be beaten for it all to be brought down.
- Eye Beams: The head can juggle you with these.
- Shown Their Work: The pieces the creature is made from are background props from the movie - e.g, its right arm is a machine from Oogie's Lair.
- Vacuum Mouth: Its left arm, when detached.
- Well-Intentioned Extremist: All its doing is trying to find a heart of its own, unintentionally taking away joy in the process. What's even sadder is that, per 3D's revelation that anything could get a heart of its own given enough time, had Sora and company not fought it... a heart just might've developed in the poor guy after time passed.
Voiced by: Megumi Toyoguchi (Japanese), Willa Holland (English)
Appearances: 0.2 Birth by Sleep -A Fragmentary Passage-
A malevolent doppelganger of Aqua she encounters during her adventures in the Realm of Darkness. It is the physical manifestation of all of Aqua's fears and doubts crafted by the remains of the Magic Mirror in the World Within.
- An Ice Person: Like Aqua, she can use Blizzard magic. Her most often used attack is to conjure four giant ice blocks and fire them at Aqua.
- Bonus Boss: Serves as a part of the Zodiac Boss Rush.
- Casting a Shadow: Downplayed. Phantom Aqua doesn't use any darkness-based attacks, but her Bizzaga shards are shrouded in dark energy.
- Creepy Monotone: While Willa Holland voices Aqua with a dose of Dull Surprise, Phantom Aqua manages to make it sound truly menacing.
- Dance Battler: Being an evil copy of Aqua, it's only natural her fighting style is just as graceful and elegant as the original's.
- Dark Action Girl: She's a villainous doppelganger of Aqua and has all of her skills.
- Dark Reprise: Her Leitmotif is a sinister and psychotic arrangement of Aqua's own theme.
- Doppelgänger Attack: Phantom Aqua's signature ability is to create multiple copies of herself to confuse Aqua.
- Enemy Without: She is all of Aqua's fears and doubts made flesh... And she doesn't like you one bit.
- Establishing Character Moment: The first boss fight with her opens with her walking out the mirror and spouting the above quote before engaging Aqua in battle.
- Evil Counterpart: To Aqua, naturally.
- Evil Laugh: Occasionally lets one out during the boss fight.
- Final Boss: She is the final opponent of the Zodiac Boss Rush.
- Mirror Boss: Literally and figuratively. She is a dark copy born from a Magic Mirror and she has all of Aqua's attacks as well as a few of her own.
- Occult Blue Eyes: Her eyes are a paler shade of blue than Aqua's, highlighting her otherworldly nature.
- Recurring Boss: Fought three times throughout the game... four times really, if you count the Zodiac Boss Rush.
- Straw Nihilist: All throughout the World Within, Phantom Aqua subjects you to constant mockery and tosses a slew of nihilistic jeers at you.You'll never see the Realm of Light again.Is there any point in continuing this fight?No one can save you, and no one wants to.Are you really worthy of being a Keyblade Master?You're a failure.Just let go of everything and fade into the darkness.
- Super Mode: She can use Aqua's Spellweaver.
- Teleport Spam: Constantly teleports around the arena.
- Took a Level in Badass: With each battle, she gets stronger and more difficult. The fight with her in the Zodiac Boss Rush is her at her strongest.
A secret gummi ship boss hailing from the game Einhänder. Initially sent after the titular ship in its home game, the Schwarzgeist is a Humongous Mecha fought in the middle of a storm, and proves to be one of the toughest gummi challenges in the game, firing salvos of missiles, lasers and aided by Monitors.
- Attack Its Weak Point: Much like Einhänder, the narrow part that fires the lasers is the only place the Schwarzgeist will actually take damage.
- Bonus Boss: An optional boss, and one of the tougher fights in the game.
- The Bus Came Back: It resurfaces after a 21-year long absence since its original game's release.
- Defeat Means Playable: One of the fight's rewards is a Gummi version of the Schwarzgeist itself.
- Easter Egg: Bring the Endymion ship to battle against it, and the original version of "Thermosphere" will play in lieu of its remix.
- Fragile Speedster: The Monitor lacks the power and bulk of the Schwarzgeist, but is extremely fast, relying on you being worn out from the main fight and either choking or letting your guard down to defeat you at the last minute.
- Giant Space Flea from Nowhere: It has zero relation to the main plot, only serving as a Bonus Boss and a cool throwback to Einhänder.
- Humongous Mecha: The Monitor is roughly the same size as the Gummi ship, but both ships look tiny compared to the Schwarzgeist.
- Leitmotif: It brings with it a remix of "Thermosphere", its battle theme from its home game. The Monitor gets the original version of "Afterimage".
- Mighty Glacier: The Schwarzgeist is entirely stationary save for the moving missile launchers and moving up and down for certain attacks, but said attacks tend to hit like a truck. While it has surprisingly low health for a Gummi ship boss, it makes up for it by having a small weak point constantly summoning shields to block your attacks.
- Mythology Gag: When you confront it for the first time, it will enter the fight by flying over your ship from behind, just like in Einhänder. The Monitor flying out of the top of the main ship upon its destruction is also from the original game.
- Names to Run Away from Really Fast: Schwarzgeist is German for "Black Ghost".
- Sequential Boss: After Schwarzgeist itself is defeated, you still need to take down a remaining lone Monitor, like in its home game. Unlike the original game, the Monitor fight is mandatory, whereas not destroying a certain part of the Schwarzgeist would skip the entire phase.