Spoilerina is a small, pale-skinned Yo-kai with big, black, shiny eyes. She has big, blue, dot-style eyebrows and tiny, blushful cheeks. Her hair is blue and entirely pulled back, with a giant flower piece on each side of her head. She wears a dull, white ballerina dress with yellow ruffles underneath, a white collar, and blue ballerina slippers that match the bow around the waist.
Spoilerina enjoys leaking information and spoilers, considering any attempt to avoid them as a challenge. The conclusions of movies are a personal favorite topic of hers. She often ends her words with "-erina" as a verbal tic. She even spoils her appearance in the game before the player even befriends her!
Spoilerina can Inspirit people by dancing above their heads. This causes them to leak information that she wishes to broadcast, compelling her victims to go to any lengths to spread said information. Her Inspiriting ability even seems to extend to machines, for she was seen manipulating the display of a road sign simply by dancing above it.
According to Whisper and herself, Spoilerina has spent centuries perfecting her art of spoilers.
Yo-kai Watch 2
To befriend Spoilerina, the player must befriend the following eight Yo-kai to unlock her seal in the Medallium:
Twinkle Toes (Japanese: かれいなステップ,Karei na Suteppu)
Dodges and returns every enemy attack. (YW2) Often avoids enemy Techniques. (YW3)
Attack (hits a nearby enemy)
Paradise (Heals a lot of HP. However, it takes a long time to use again)
Greatly increases chance of dodging attacks.
Yo-kai Watch 3
Yo-kai Watch 4
Yo-kai Watch Blasters
Yo-kai Watch Busters 2
Yo-kai Watch: Wibble Wobble
Yo-kai Watch: Ukiukupedia
Level 30 →
Befriended: "You already knew that I wanted to be your friend? Looking forward to it!"
Loafing: "Ready for a nap."
Receiving Food (favorite): "Very good."
Receiving Food (normal): "It's OK."
Receiving Food (disliked): "How rude..."
Traded: "Oh, you're going to fall in love with me. Spoiler alert!"
In the anime
Spoilerina first debuted in Yo-kai Spoilerina at the end of Failian's segment, spoiling the story behind the rest of the episode. Later on in the episode, Spoilerina properly appeared in front of Nathan Adams as he was about to watch the movie Space Wars 3 and attempted to spoil the ending for him. When Nate refused and ran away from the cinema, preferring to miss the movie entirely rather than be spoiled, Spoilerina hounded Nate by Inspiriting other people around him so they would leak the ending to him. After Spoilerina affected both Whisper and Jibanyan, Nate summoned Wazzat and instructed him to wipe his memory if Spoilerina leaked the ending, but discovered that Wazzat had also become affected and tried to spoil the movie for him as well. Nate eventually resorted to hiding in his closet, but Whisper and Jibanyan forced him out by attempting to shout out the ending. At that point, Spoilerina admitted that Nate impressed her with his persistence in avoiding her spoilers, and gave him her Medal, promising not to spoil the movie. Despite this, Nate ended up spoiled by other moviegoers discussing the film, disappointing Nate for which Spoilerina was quick to disclaim responsibility. Whisper advises Nate to summon Wazzat again.
In EP127, it is revealed that Spoilerina, when she was alive, was a girl by the name of Rina Haruno. Rina was a novelist who is notoriously known for spoiling her own novel works, which earns her a nickname 'The spoiling Rina'. During a press conference for the announcement of her novel's movie adaptation, her publisher's editors, knowing her unprofessional behavior, turns off the electricity of the event hall. Rina, who was about to spoil the movie, tries to stand onto the table, but she slips and falls off of the event hall to her death.
"Netaballerina" and "Spoilerina" is a portmanteau of spoiler (Japanese: ネタバレ,netabare) and ballerina.
Spoilerina's "random" nicknames in Yo-kai Watch 2 are: Ruffles, Chatty, Guesswat and Fun Done.
Spoilerina is the only Legendary Yo-kai to directly tell the player how to unlock her in the main games.
As of Spoilerina's appearance in the anime, Nate would encounter all future Legendary Yo-kai in the same way regular Yo-kai are encountered.
In other languages
A combination of netabare ネタバレ (spoiler) and ballerina (バレリーナ).
From deballage (reveal) and ballerine (ballerina).
From chafada (chaffed) and "bailarina" (ballerina).