History RedOniBlueOni / ComicBooks

** In Batman and Superman's case, it's just as often played the other way around, with Batman's [[TheCowl dark vigilantism]] making him a Red Oni, and Superman's more [[TheCape traditional]] heroism making him the Blue Oni. Superman is usually written as a LawfulGood NiceGuy, whereas Batman can range from a ChaoticGood JerkWithAHeartOfGold to an outright ManipulativeBastard, though they both have their fair share of Lawful and Chaotic traits.

* The crazy and spirited ComicBook/HarleyQuinn is the Red Oni to Poison Ivy's cool and methodical Blue Oni; while Harley dresses in the color associated with a Red Oni, Ivy is clad in green (like her namesake).

* ComicBook/HarleyQuinn is the Red Oni to Poison Ivy's Blue Oni; while Harley dresses in the color associated with a Red Oni, Ivy is clad in green (like her namesake).

* ''ComicBook/HarleyQuinn is the Red Oni to Poison Ivy's Blue Oni; while Harley dresses in the color associated with a Red Oni, Ivy is clad in green (like her namesake).

* Similar to Two-Face above Bruce Banner is the Blue Oni to ComicBook/TheIncredibleHulk's Red Oni, with the Hulk being the embodiment of Banner's rage.

* In ''ComicBook/{{Magekiller}}'', Marius is very quiet and reserved. His partner Tessa is somewhat impulsive and never shuts up.

** An "emotional spectrum" has been established in recent years, explaining that each major emotion has a color associated with it: Lantern Corps using the "warmer" colors are unrestrained and selfish Red Oni (red rage, orange greed, and yellow fear) while the "cooler" ones are calm and focused on others as Blue Oni (blue hope, and indigo compassion). The exception are the Star Sapphires who wield violet love, as their color is one of the "cooler" ones but they're easily as passionate as the "warm" Corps.
** In a more literal color contrast, the power of Blue Lantern corps can neutralize the effects of a Red Lantern RingOfPower in its user, both the emotional (mindless rage) and the physical ones (severe weakening of the original circulatory system, as the red rings replace this body function).

** Sort of a running theme with Deadpool, actually. Another example of a Blue Oni paired up with him is {{Taskmaster}}, a level-headed mercenary whose unique abilities are based around observation and analysis and who will typically run away from a fight if he determines that he can't win it, in contrast with Deadpool's typically cheerful, brainless recklessness, but the most striking comparison is probably with [[TykeBomb Domino]], who, like Deadpool, is the cast-off product of a secret government SuperSoldier program and favours the same style of costume and equipment (even wearing what was essentially a blue-and-black woman's version of Deadpool's distinctive red-and-black bodysuit in the ''Cable & Deadpool'' series), but is typically cold, clinically rational, and often emotionally conflicted over her actions, and her special ability is essentially not getting hit ''at all'' in a fight, where Deadpool's powers effectively allow him to [[IncrediblyLamePun wade]] anything that's thrown at him.

* The title character of ''ComicBook/{{Shakara}}'' has full red eyes and is, in fact, a completely red liquid being in a suit of {{powered armour}}; he is also insane, reckless, and driven exclusively by rage and hatred. This stands in stark contrast to Cinnibar Brenneka, hero of the Shakara, who was always very stoic, rational, and driven by a higher calling. He also had blue yes and body markings.

* The title character of ''{{Shakara}}'' has full red eyes and is, in fact, a completely red liquid being in a suit of {{powered armour}}; he is also insane, reckless, and driven exclusively by rage and hatred. This stands in stark contrast to Cinnibar Brenneka, hero of the Shakara, who was always very stoic, rational, and driven by a higher calling. He also had blue yes and body markings.

* Dream of the Endless in "ComicBook/TheSandman" is blue oni (the kind with lots of inner turmoil) next to virtually everyone he encounters. Most notably he plays the role throughout his relationships with his ever-cheerful and sociable sister Death and with his rambunctious brother Destruction. In Brief Lives in particular when he plays blue to the red of his sister Delirium, who is impulsive to the point of, well, delirium. The only character who is more of a blue oni than Dream is the eldest sibling Destiny (and this one without the inner turmoil).

* Dream of the Endless in "ComicBook/TheSandman" is blue oni (the kind with lots of inner turmoil) next to virtually everyone he encounters. Most notably he plays the role throughout his relationships with his ever-cheerful and sociable sister Death and with his rambunctious brother Destruction. In Brief Lives in particular when he plays blue to the red of his sister Delirium, who is impulsive to the point of, well, delirium.
** The only character who is more of a blue oni than Dream is the eldest sibling Destiny (and this one without the inner turmoil).

* SonicTheComic Sonic and Shortfuse are the Red onis to Amy's and Tekno's Blue onis also there is The Badnik Army Repair Functionaries (or B.A.R.F.) which has Bert a Red oni and Cam a Blue oni.

* Joe Quesada has made statements expressing this sentiment about DC and Marvel in general, likening the former to a very proper Asian family and the latter to a loud, boisterous Italian family. Bonus points? DC's logo is blue and Marvel's is red.

* {{Wolverine}} (Red Oni) and ComicBook/{{Cyclops}} (Blue Oni) - Wolverine's color may be yellow, but he's easily the Red Oni of the team.

*** Comes up again in ''[[{{X-Force}} Uncanny X-Force]]'' with Fantomex, the cool and calculating gunslinger whose powers let him manipulate his enemies into fighting each other. And, as with Cable, Taskmaster, and Domino, they are (sort of) friends.
* Saxon and Kenzie from ''MouseGuard''--even their cloaks match.

* Hawk and Dove of DC Comics are an embodiment of this trope, with Hawk being red and Dove being blue. Hawk is an aggressive muscleman, quick to anger and always ready for a fight. Dove is a cool, slender peacekeeper who tries to avoid direct conflict whenever (and however) possible.

** This is reversed in ''GrantMorrisonsBatman'', where original Robin Dick Grayson takes over the role of Batman, while Batman's son Damien becomes Robin. Dick is cheerful and spirited, Damien is somber and brooding. This also mirrors the dynamic between Dick-as-Nightwing and both Nite-Wing and the Red Hood.

* From Everywhere in ''{{ElfQuest}}'': there's Cutter and Rayek, Two-Edge and Winnowill, Ember and Suntop, and Bearclaw and Joyleaf.

* In Franchise/{{Batman}}-Franchise/{{Superman}} team-ups, usually the writers emphasize Supes' Red Oni qualities and Batman's Blue Oni qualities, even matching their cape colors. Likewise, when they team up, Lex Luthor has his Blue Oni qualities emphasized and the Joker his Red Oni ones, though their color schemes tend towards the purple and green. However, when the Joker makes an appearance with Harley Quinn, he becomes more of a sociopathic Blue to balance her Red.

* SpiderGirl (Blue) and [[spoiler:her [[CloningBlues clone]] April]] (Red) have elements of this, especially once [[spoiler: April]] turns into [[spoiler: DarkActionGirl BloodKnight]] [[MeaningfulName Mayhem]]. Their color schemes are the opposite of their personalities, though.
** May can also be seen as the Red to [[spoiler: Darkdevil's]] Blue thanks to their [[SiblingYinYang Cousin Yin Yang]].

* In ''ComicBook/{{Asterix}}'', Asterix is cunning and relatively laid-back (blue) in contrast to his emotional and sensitive best friend Obelix (red).

* SpiderGirl (Blue) and her [[spoiler:[[CloningBlues]] clone April]] (Red) have elements of this, especially once [[spoiler: April]] turns into [[spoiler: DarkActionGirl BloodKnight]] [[MeaningfulName Mayhem]]. Their color schemes are the opposite of their personalities, though.