Characters from Doraemon: Nobita's Treasure Island.
SPOILERS UNMARKED
Flock
A young boy the gang picks up shortly after Shizuka's abduction. While claiming to be a member of the pirates, Flock secretly opposes them, specifically Captain Silver - his father - and decide to help the heroes track down Shizuka.
- Adorably Precocious Child: He behaves way more matured for a kid his age should be, mostly because of his past.
- Dark and Troubled Past: Ever since the death of his mother Fiona and his father Silver suffering a Sanity Slippage, life have not been the same for Flock, with plenty of Troubled Backstory Flashback given to him.
- Hair of Gold, Heart of Gold: He's blond, and one of the nicest new characters introduced for this film.
- Hates Their Parent: He ended up hating his father due to the latter's descent into madness and neglect for his family, thinking his father hates him back. Nobita (who had a fight with his own father earlier in the film) talks him out of it.
- Nice Guy: Once he realize Doraemon and co. are on his side, he gets along smoothly with the gang.
- Pint-Sized Powerhouse: He's a child around Nobita's age, and he packs a punch in his fights.
- Playful Hacker: He's quite a capable hacker who can out-perform Silver in the finale, stopping his doomsday machine.
- Strong Family Resemblance: He inherits his mother's blond hair and blue eyes, from what little the audience sees in Fiona during the flashbacks.
Sarah
No, Shizuka didn't get another dye-job.
Flock's twin sister who looks almost identical to Shizuka, save for her hair and eye colours. The two girls hits off straightaway after realizing how similar to each other they are, and quickly forms a close bond.
- The Cutie: Sweet, innocent, adorable, and forges an easy friendship with Shizuka.
- Hair of Gold, Heart of Gold: Just like her brother. Actually, even moreso than her brother.
- Identical Stranger: To Shizuka, which she looks almost identical to save for Sarah having blonde hair.
- Mythology Gag: This is the third time (after Doraemon: Nobita's the Legend of the Sun King and Doraemon: Nobita and the Island of Miracles ~Animal Adventure~) where an Identical Stranger of the protagonists shows up. This time however it's Shizuka who meets her doppelganger instead of Nobita.
- Nice Girl: Despite her upbringing under a ruthless pirate captain and the harsh conditions surrounding her.
- Strong Family Resemblance: Like her brother, Sarah looks like a miniature clone of Fiona.
Quiz
Wrong answer! *THUMP*
Flock's robot companion, a sentient, mechanical parrot made by his father - before Captain Silver's descent into villainy. Being one of his last memento of his father's goodness, Flock considers Quiz an inseparable dear friend.
- Animal Jingoism: He is a robot bird, while Doraemon is a robot cat. As such, they are frequently at odds with each other (mainly because Quiz keeps calling Doraemon a tanuki).
- Copycat Mockery: He will repeat others' sentences, just like an organic parrot, just for the sake of messing with them.
- Dope Slap: One of his favourite tricks when participants of his riddles got a wrong answer is to roll himself into a ball and thump them on their heads, and sometimes, faces (resulting in a comical Sunken Face). At one point Quiz takes it a little too far when he targets Gian's crotch.
- The Gadfly: While he's quite chummy with his owner, Flock, towards the main cast however Quiz just couldn't stop trolling and annoying them.
- Mechanical Animals: He's a parrot robot.
- Meaningful Name: He's a robot who likes to give random quizzes to his owners, hence his name. Flock's quite good at guessing the answers to Quiz's... er, quizzes, and Doraemon also gets quite a few, but Nobita, Gian, and Suneo not so much.
- Memento MacGuffin: A gift from Silver to his children, and one of the last traces of the good man Silver once was to his kids before his Start of Darkness.
- Morality Pet: He's one of the last reminders to Flock and Sarah that there's still some good left in their father.
- Pirate Parrot: A robotic version.
- Playful Hacker: As the ending reveals, it turns out Quiz is capable of hacking into the computer system of Silver's doomsday device, proving himself crucial in saving the day.
- Robot Buddy: A robotic parrot buddy.
- Transforming Mecha: Can shift between parrot form and floating robotic sphere form. The latter is often used to knock people in their heads.
- Vitriolic Best Buds: Despite getting on Doraemon's nerves, his relationship with Doraemon develops this way, as Doraemon proves to be the most adept at answering Quiz's riddles out of Nobita's friends. When they part ways, Quiz uses one last riddle to genuinely thank Doraemon for his help.
Captain John Silver
Silver in happier times, with Fiona and kids.
In the present as the Big Bad.
The dreaded pirate captain and ruler of Treasure Island, who turns out to be a massive, state-of-the-art spaceship from the 22nd Century equipped with efficient mining equipment and various technology, including a beacon that extends all the way to the earth's core. He's also the father of Flock and Sarah, whom he had grown estranged from after the death of his beloved wife, Fiona.- Ambition Is Evil: His villainy is driven by his desires to restart the world after the death of his wife.
- Archnemesis Dad: The father of Sarah and Flock, as well as the ruthless pirate captain who wants to destroy the world while restarting civilization on another distant planet.
- Badass Longcoat: His black trench coat, like every good pirate captain out there.
- Big Bad: He's the main villain of the picture, whose pirate minions repeatedly antagonizes Doraemon and gang, and his plans to restart civilization on a different planet could spell destruction of all life on earth.
- Classy Cane: Carries one whose tip ends in avian talons.
- Contrasting Sequel Antagonist: The gang's previous encounters with original villains include undersea warlords, ruthless alien entities, and eldritch elemental monsters. Captain Silver on the other hand is one of the few wholly human villain, whose backstory is portrayed sympathetically and gains a genuine redemption over his actions.
- Dull Eyes of Unhappiness: It seems to be Silver's default expression since his wife's death.
- Even Evil Has Loved Ones: He loves his deceased wife Fiona, and realizing his ambitions have driven away his children, had a last-minute Heel Realization.
- Heel–Face Turn: After seeing Sarah and Flock, eye to eye, for the first time, and realizing how far he had sunk in villainy, he immediately cancels his apocalyptic plans.
- I Was Quite the Looker: Back when his wife Fiona was still alive, he was quite the handsome young man. After her death and his descent into villainy...
- Karma Houdini: Given that Silver turned over a new leaf at the end of the picture, he never suffered any actual consequences for, uh, trying to wipe out all life on the planet?
- The Lost Lenore: He pins over his dead wife, Fiona, and much of his goals of are driven by his desire to fulfil Fiona's wishes to save humanity from destruction.
- My God, What Have I Done?: The look on his face after seeing his children embrace him, despite knowing he intends to kickstart a genocide, says it all, at which point Silver starts breaking down and realizing the errors of his actions.
- Prematurely Grey-Haired: The trauma of losing his wife, and subsequent estrangement from his children and devotion to launch Treasure Island to space at the cost of wiping out all life on earth had taken a toll on his health, as seen in his hair colour changing from blue in the past to grey-white in the present.
- Restart the World: His modus operandi, where he'll drain energy from earth's core to send Treasure Island and her inhabitants into space to a distant planet - dooming the rest of humanity in the process.
- Start of Darkness: His Sanity Slippage begins with the death of Fiona, and then he saw the earth being destroyed in the future and starts his path towards darkness.
- Suspiciously Similar Substitute: He appears to be based on Commander Liebert, as an overly-ambitious Captain and figure of military authority, both men having lost their wives in the backstory and being driven by tragic rage to pursue their goals in their spouse' honour, until suddenly realizing their dreams nearly cost them whatever little family they have. Though there's a slight difference in that Captain Silver willingly turned to villainy while Liebert was driven by Angolmois' influence.
- Self-Fulfilling Prophecy: Although not stated onscreen, Silver's Bad Future vision displayed by his Time Machine is implied to be the aftermath of his operations - should he really drain the earth's core of energy, he will unleash a cataclysm that destroys most of earth's surface, turning it into the wasteland he saw alongside crashes down the treasure island itself anyway. Unfortunately, his grief and ambition had taken over common sense.
- Tragic Villain: After Fiona's death, he started suffering Sanity Slippage and upon witnessing a vision of a doomed earth, decides to honor Fiona's wishes to save humanity... by wiping off all life on the planet while restarting civilization.
- Well-Intentioned Extremist: He decides humanity is hopeless, and thus decide to save all who serves him on his island while speeding up the inevitable extinction of mankind so they can restart life on another world.
- When You Coming Home, Dad?: Silver's ambitions had made him increasingly estranged from his kids, Sarah and Flock.
- Younger Than They Look: Given he's a young father in the flashback, the stress of Fiona's death made him look much older than he actually is - as if he had aged a few decades in less than five years.
Vivi and Gaga
Vivi swings a sword, and Gaga is about to shoot the audience.
A pair of lieutenants of Silver's minions, sent by their boss on missions.
- Beard of Evil: On Gaga, whose beard splays out into eight directions.
- Co-Dragons: Two comical henchmen leaders directly serving Captain Silver.
- Extendable Arms: Gaga can stretch his arms - both being Artificial Limbs - as far as he needs, pointing both his guns at Suneo and Gian who's at opposite ends of Doraemon's ship, much to their horror.
- Fiery Redhead: Vivi is the sole red-haired villain of the picture, and have quite a rough, fiery attitude.
- Guns Akimbo: Gaga uses two guns at the same time.
- Master Swordswoman: Vivi's a serious devil with her sword, using it to cut bullets into half in mid-air. There's a reason why she solely wields her blade while Gaga and the rest of the pirates have firearms.
- Mook Lieutenant: Leads Captain Silver's army of cutthroat minions.
- Parrying Bullets: Vivi's skill with her cutlass is exceptional enough for her to cut an Air Cannon round fired at her direction into two.
- Pirate Girl: Vivi, she's also the sole female pirate character.
- Punch-Clock Villain: When they're off-duty, they're actually quite chummy and not at all hostile.
- Repetitive Name: Vivi? Gaga?
- Sinister Shades: Gaga wears sunglasses in all of his action scenes, and is the only pirate minion of Silver's to do so.
- Those Two Guys: Always seen together in every scene.
- Would Hurt a Child: The reason why they didn't hurt Shizuka is because they mistook her for Sarah, and was delivering Shizuka back to their boss. But as Nobita and gang tries pursuing suit, Gaga doesn't hesitate to fire his guns on them.
