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Red Oni Blue Oni: Visual Novels

  • Twin sisters of the Nasu Verse, Aoko and Touko, are this. One is chaotic, the other lawful. Touko was originally depicted as having blue hair until the Kara no Kyoukai OAV gave her an Adaptation Dye-Job to resemble her twin sister more. Genetics beats out symbolism these days. Nevertheless, their Mage Titles are "Red" and "Blue". (Don't bring it up, it's a sore subject.)
    • Inverted in terms of their titles. Aoko exhibit the traits of red but her title is "Blue" (since the color blue is associated with her magic) and visa versa for Touko. Aoko's name also comes from the Japanese word for blue, "Aoi."
  • In Fate/stay night Rin and Saber are this.
    • Slightly played also with Archer and Lancer by their color scheme, but their personalities are exactly the opposite.
  • Mion of Higurashi: When They Cry has a tattoo of a blue oni, prominently featured in the opening. However, she's far more like the red oni in terms of personality. Then again, the tattoo isn't "hers" to begin with, thanks to an unfortunate Twin Switch in which Shion was supposed to get it. As a result, Mion is supposed to act Red as part of the older sibling role she's forced to play, while her sister Shion acts Blue as part of the younger sibling's role. In truth, Mion's true self is blue while Shion's is red
    • Also, in episode 20 of Higurashi, Hanyuu says "If Keiichi is a flame that burns red, then Rena is a quiet, blue flame!"
    • Keiichi (red) also has this relationship with Mion (blue) to a lesser degree.
  • In Umineko: When They Cry, Lambdadelta is the red to Bernkastel's blue. In the first half of the series, anyway. In the second half, as their true motivations are revealed, their roles are switched around.
    • Shannon can be seen as the red to Kanon's blue most of the time, but when it comes to matters of love Shannon is more calm and collected while Kanon is more hot blooded and irritable. It is also heavily implied that they are in fact the same person, and their red and blue dynamic shows Yasu's conflicting views about love.
  • Hot-Blooded fighter Kid and calm magician Magil in Radical Dreamers.
  • The Ace Attorney series has some Red and Blue Onis. An inverted example is Phoenix, the blue-clad defense attorney (who isn't as hot-headed as a typical Red Oni, but he doesn't tend to think things through) and his red-wearing frenemy Miles Edgeworth, who is calm, cool, and calculating most of the time. In fact, the lawyers with the more fiery reddish qualities (Phoenix, Franziska, etc.) have a blue motif in their dress, while the more aloof ones (Edgeworth, Godot's visor and clothing as Diego Armando) have a red motif.
    • Another example from the later game, Apollo Justice, has the title character wearing a red vest - his preference for the color red is even mentioned a couple times in-game - and being rather impulsive (also, his hair is horns!). There are a couple of blue onis in the game. Kristoph Gavin, for one, is, though friendly, very serious and icy as well and wears a blue suit. However, in the end, Kristoph pretty much out-hams every murderer in the series. Klavier Gavin is the epitome of "cool collectedness" and wears a purplish maroon getup.
    • Also from Apollo Justice, to a lesser degree, we have another inverted version with Klavier in his pinkish/reddish/purplish outfit as a cool straight-man, and his band-mate Daryan Crescend in a blue, shark-like outfit being quite temperamental.
    • Another one from Apollo Justice: Phoenix Wright is finally living up to his colour scheme and now plays the cryptic and coolheaded Chessmaster in direct contrast to Apollo's Hot-Blooded and flustered character.
    • Also played with in Justice For All: Matt Engarde, a popular - if somewhat dim - celebrity wears a scarlet jacket, whereas his manager, Adrian Andrews, is calm and collected and wears blue. In reality, Engarde is a vicious, self-obsessed manipulator and Adrian is a co-dependent, frail woman who's deathly afraid of Engarde.
    • While Phoenix and Apollo might be reds to their prosecutor rivals' blues, they also both tend to play the more rational Straight Man to to their Genki Girl Cloud Cuckoo Lander assistants.
    • And let's not forget about Robin Newman and Hugh O'Conner in Dual Destinies. Robin, who is very hyperactive and likes to shout, wears red, while the calm, laid-back Hugh wears blue.
  • Little Busters!: Haruka and Mio fit this whenever they interact, with overly emotional, energetic, ditzy, impulsive, Manic Pixie Dream Girl-esque Haruka being the Red Oni and quiet, sly, intellectual, cool, stoic Mio being the Blue Oni.
    • Also, Hot-Blooded Dumb Muscle Masato and his friend/rival, the Stoic, Kendo-playing Kengo. Fittingly, Masato wears a red shirt, while Kengo is almost always wearing his navy blue Kendo outfit.
  • Hatoful Boyfriend: the human girl is generally red to everyone else, with the exception of Oko San who matches her for hot blood. As brothers, Yuuya and Sakuya are red and blue respectively.
  • Remember11 has two protagonists: Kokoro, a girl who is reasonably smart and well-educated but also friendly, passionate when arguing, and has a tendency to jump to (often wrong) conclusions about things; and Satoru, a student of the natural sciences who tends to analyze everything with scientific methodology (but not cold—he can also be quite passionate when the situation calls for it). The colors are also made explicit in the Title Sequence: The two are seen passing by each other, where their whole bodies are tinted their respective colors. In another instance Kokoro is seen turning into Satoru; their eyes flash first red then blue.

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