Red Oni Blue Oni: Fanfic

  • Advice And Trust: Asuka and Rei. The differences between both become less extreme after Rei stops taking emotion-suppressor meds, but Asuka is still hot-blooded and impetuous and Rei is still quiet and calm. During the story their friendship develops and they become a very close-knit combat unit together with Shinji.
  • Dungeon Keeper Ami features Jadite and Ami, occasionally. Jadeite also fills the same role to Cathy. On the other hand, Tiger is a red oni to everyone, even Jadeite.
  • Evangelion 303: Asuka is the Red Oni -she is hot-tempered, hot-headed, loud, boisterous, proud and impulsive-, and Shinji is the Blue Oni -calm, modest, quiet, patient, wary, understanding-. They are a Battle Couple.
  • HERZ: Asuka is the red oni (she is temperamental, rash and hot-headed) and Rei the blue one (she is calm and soft-spoken). Due to their clashing personalities there was some hostility between them when they were young, but after twelve years it has mostly faded.
  • The One I Love Is: Asuka -Hot-Blooded, hot-headed, angry, loud- and Rei -emotionless, detached, calm, quiet-. Their relationship greatly evolves throughout the story. At the beginning Asuka detests Rei and Rei ignores Asuka. Later, when they start competing over Shinji, they can not stand each other. Finally, after a violent fight, they make up, call a truce, and they gradually become friends.
  • In the Great Chicken Miasma's Mario fanfic Better Off Alone, the young Yoshi Waffles is the Red to everyone else in the group's Blue.
  • In the fanfic Disgaea: Jewel of the Gods, Laharl is the red oni to Adell and Mao's blue oni.
    • Adell can also, arguably, qualify as the red oni to Mao's blue oni.
  • What About Witch Queen? has two pairs like this on opposite sides of war. On Arendelle side, general Kristiani is impulsive, "let's crush them now" red to Olafsen's more careful blue. On Weselton side, general Potter is red with More Dakka approach, while general Windsor is blue and described as "cold-blooded, sneaky bastard" by one of the Arendellans.
  • Winter War gives us Ikkaku and Nanao, the co-leaders of the Hueco Mundo mission. Ikkaku is a Hot-Blooded Blood Knight with a newly acquired habit of giving nicknames and a physical fighter with no aptitude for kidou. Nanao is a serious, methodical, control obsessive Badass Bookworm and kidou specialist who so far has avoided hand-to-hand combat.
  • Eri's Game has Eri as the Red Oni and her best friend, Shiki, as the Blue Oni.
  • Swing123 and garfieldodie's Calvinverse has Dr. Brainstorm as the red oni, with his foil Jack being the blue.
    • The main cast also has this distinction. From most red to most blue, they are as follows: Socrates, Calvin, the MTM, Hobbes, Sherman, and Andy.
  • To Kill A Thief has Light Yagami as red due to being crazy with Knight Templar ideas, while his partner, Miyako Toudaiji, is blue due to being sane with By-the-Book Cop tendencies.
  • In White Rain, it is Sasuke who is the Red Oni to Naruto's Blue, strangely enough. Their relationships also have the same distinction.
  • The Wizard in the Shadows has Harry as the Red Oni to Aragorn's blue.
  • Apprentice has Sasuke and Mecha Sally.
  • Children of Time has Beth's red to Holmes's blue.
  • The dynamic between Chaos and Takato in the Tamers Forever Series is an interesting inversion of this trope. ChaosGallantmon has blue highlights on his armour, while Gallantmon has red highlights, and Chaos is also much more ruthless than Takato, but surprisingly enough, Takato is actually the Blue Oni, being much more subtle and thoughtful than the impulsive Chaos.
  • Working Together has Rika Nonaka as the Red Oni and Arch-Enemy Valmont as the Blue Oni.
  • Vale Whitaker, the Shrinking Violet heroine of the Hunger Games fanfiction Some Semblance of Meaning, is the Blue Oni in contrast to several Red Oni in the story, including her sister Maybelle, her district partner Kit, and Fiery Redhead Fen.
  • Kitsune no Ken: Fist of the Fox gives us Suigetsu and Jugo, red and blue respectively. Suigetsu is Hot-Blooded, while Jugo's more calm and methodical.
  • The Medaka Box fanfic World As Myth has the friendship between the violent Unzen and the phlegmatic Choujabaru.
  • A Necromancer's Wild Card has Ayumu Aikawa as the Red Oni to Minato Arisato's blue.
  • Peace Forged in Fire plays this contrast between Rahaen'Enriov D'trel ir'Aehallhah t'Rihannsu and Khre'Riov Morgaiah "Morgan" ir'Sheratan t'Thavrau, the two lead members of the Romulan Republic diplomatic team. D'trel doesn't like Velal, the Praetor of the Romulan Star Empire, and has diametrically opposed political views, and runs on Unstoppable Rage in battle, while Morgan is a more traditionalist Romulan, shares a friendly drink with Velal to hold the negotiations together, and has a much calmer, more rational fighting style. Also visible in their ship choices: D'trel's Kholhr is a Glass Cannon/Fragile Speedster T'varo-class light warbird, while Morgan captains a Mighty Glacier D'deridex-class battlecruiser.
  • In contrast to the source material, in Traveler, Ash is blue to Gary's red. He serves a similar role to his early travelling companion Jonathan. Lance and Steven's relationship has tones of this, with Lance as red and Steven as blue.
    • Appropriately, among Ash's Pokemon, Infernus plays the red to Torrent's (post-evolution) blue.
  • The Snow Has Stopped The Rain has Zangetsu, who's crude, violent and hot-blooded (red) and Shirayuki who is (usually) calm, collected and proper (blue).