History Main / ObliviousYoungerSibling

* Tella sometimes appears to be this in Literature/{{Caraval}}.

** Ema Skye is ''certain'' her big sister didn't commit the murder a witness and a few cameras caught her doing [[spoiler: She's right. The guy was murdered beforehand by Damon Gant, who blackmailed Lana into helping him dispose of the body.]]

* In ''Series/{{Noob}}'', one of the title guild's members has a younger brother who has been playing the {{MMORPG}} in which the series is set much longer than him and reached a much higher level. He doesn't notice for quite a while despite the fact that they sometimes take turns on the same computer.

* ''Anime/{{Scryed}}'' has the reverse situation, where Kanami seems oblivious to Kazuma's powerful Alter abilities and sees him as a kind-hearted layabout. It's later shown that Kazuma intentionally acts uncharacteristically pathetic around Kanami to encourage her to be more independent, apparently so that she'll have an easier time coping if the male half of their two-member family were to die violently.

* Likewise subverted in ''Manga/{{Airmaster}}'', where Maki's little sister, unlike everyone else, describes her as a huge clumsy ogre who gets stupider each time they meet.

* ''Literature/TheDresdenFiles'': Harry Dresden played this once in the novella ''Backup''. [[spoiler:It's told from the point of view of Thomas, Harry's older brother. A woman hires Harry to find a kidnapped child, pressing two of Harry's {{Berserk Button}}s. What Harry doesn't know is that the woman is a bad guy manipulating him into finding a book of rituals, that Harry will find with the child, and when he hands it over to the White Council, mass-producing the book will ''increase'' it's evil power, not diffuse it.]] Thomas, who can't tell this to Harry because of that very reason, has to pull all sorts of stunts to get things to work out okay, including letting Harry beat him up.

** [[spoiler: It's been noticed that the normally intelligent and perceptive Sam has been remarkably slow on the uptake as to how the MOC/First Blade are affecting his brother through Season 9, mostly just glancing worriedly at Dean and gently broaching the topic on a few occasions. WordOfGod has suggested that when Sam found out about the MOC, he just kind of assumed Dean knew what he was doing and could handle it, and it's taken quite some time for Sam to fully grasp that neither of those things are true. There have been other factors at play as well, including a major rift between the brothers, but part of the issue seems to be that it hadn't occurred to Sam (who has often fought internal supernatural forces throughout the series) that Dean could be vulnerable to similar internal forces.]]

* Eve from ''LightNovel/{{Baccano}}'' is completely convinced that her big brother Dallas is a good person, despite increasing evidence otherwise.

* In ''WesternAnimation/Frozen2013'', Anna is convinced her [[NotEvilJustMisunderstood seemingly-evil older sister Elsa is just misunderstood]], remembering how close the two of them used to be when young, even when Elsa ends up looking ''really'' bad after seemingly ignoring Anna for most of their childhood, shooting ice spikes at Anna in the middle of an argument, and then promptly fleeing the kingdom, leaving the country in [[EndlessWinter a magical blizzard in July]]. She turns out to be right -- most of the issues really are misunderstandings or even accidents.

* Subverted with Gaz on ''WesternAnimation/InvaderZim'': she is perfectly aware that her older brother Dib is trying to thwart an alien invasion, she just doesn't care.
* In ''WesternAnimation/{{Recess}},'' Vince [[BigBrotherWorship considers his older brother, Chad, to be the epitome of coolness]], and is thus shocked when his friends reveal that he's a nerd.

* Nunnally in ''Anime/CodeGeass'' missed that whole bit about her brother being TheStrategist for LaResistance during all those times when he was [[RichIdiotWithNoDayJob cutting class]]. Justified, since he goes out of his way to hide it from her and her ill girl status (including the fact she's blind) means it's very difficult for her to investigate. Although, the fact that she is very good at recognizing voices (being blind) yet does not recognize Zero's voice as her brother's despite the digital distortion being very slight does make her fairly oblivious.

* Nunnally in ''Anime/CodeGeass'' missed that whole bit about her brother being TheStrategist for LaResistance during all those times when he was [[RichIdiotWithNoDayJob cutting class]]. Justified, since he goes out of his way to hide it from her and her IllGirl status (including the fact she's blind) means it's very difficult for her to investigate. Although, the fact that she is very good at recognizing voices (being blind) yet does not recognize Zero's voice as her brother's despite the digital distortion being very slight does make her fairly oblivious.

* In ''WesternAnimation/{{Recess}},'' Vince [[BigBrotherWorship considers his older brother, Chad, to be the epitome of coolness]], and is thus shocked when his friends reveal that he's a HollywoodNerd.

** Yukina in ''Anime/YuYuHakusho'' doesn't know Hiei is her older twin brother.

* Shuuichi, the little stepbrother of [[NobleDemon Kurama]] in ''Manga/YuYuHakusho'', is completely oblivious to his brother's demonic heritage and supernatural activities. He's also presumably oblivious to the fact that he has a demon inside his body that can possess him, or that he's being used as a hostage to keep Kurama in line.

* In ''Manga/LoveHina'', Kanako's [[RetCon fond memories]] of her stepbrother, Keitaro, makes her somewhat oblivious to his failures. But maybe sympathy, among [[BrotherSisterIncest other things]] clouds her judgement.
* ''Anime/{{Scryed}}'' has the reverse situation, where Kanami seems oblivious to Kazuma's powerful Alter abilities and sees him as a kind-hearted layabout. It's later shown that Kazuma intentionally acts uncharacteristically pathetic around Kanami to encourage her to be more independent, apparently so that she'll have an easier time coping if the male half of their two-member family were to die violently.
* In ''Manga/DeathNote'', Sayu Yagami never finds out that her brother is really Kira.

* Subverted in ''Manga/StrawberryMarshmallow'': Chika has no illusions about her elder sister Nobue. Still, the trope applies, as Nobue is the CoolBigSis to all four girls regardless.
* Likewise subverted in ''Manga/{{Airmaster}}'', where Maki's little sister, unlike everyone else, describes her as a huge clumsy ogre who gets stupider each time they meet.

* Mokuba Kaiba (''Anime/YuGiOh'') is absolutely devoted to his older brother, Seto. Indeed, he is the only regular character who calls Seto by his first name in the dub (in the Japanese, he calls him "nii-sama").
** Though he's not exactly oblivious in either the manga or anime. In the former, he even [[MrExposition talks about]] Seto's [[UsedToBeASweetKid childhood]] and rise to power.
* Shuuichi, the little stepbrother of [[NobleDemon Kurama]] in ''Manga/YuYuHakusho'', is completely oblivious to his brother's demonic heritage and supernatural activities. He's also presumably oblivious to the fact that he has a demon inside his body that can possess him, or that he's being used as a hostage to keep Kurama in line.
* Pop Harukaze from ''Anime/OjamajoDoremi'', at least for the first half of season 1. Once she becomes an Ojamajo herself she subverts the trope both in regards of what's going on and later on, her relationship with Doremi.

* Inverted and subverted in ''Manga/DeadmanWonderland''; [[spoiler: Yoh, the apparently oblivious ''older'' sibling, reveals he's known about his little sister Minatsuki's CuteAndPsycho tendencies all along, but wants to protect her anyway.]]
* In ''Manga/OnePiece'', the older brother Ace is horrified and angry when Luffy [[spoiler:goes to [[TheAlcatraz Impel Down]] to rescue him]] because he believes that Luffy's just being the typical reckless, idiotic younger brother that he remembers that always made him worry. In an interesting inversion, Luffy himself at first [[spoiler: doesn't want to go to rescue his big brother after discovering his life is in danger via his burning [[ChekhovsGun Vivre Card]] and explains that his older brother is strong and wouldn't appreciate being rescued (it's also pointed out that if the person in danger gets out of danger, their Vivre Card returns to normal). It's only when he discovers that Ace is on death row that he decides to go rescue his brother.]]
* Nunnally in ''Anime/CodeGeass'' missed that whole bit about her brother being TheStrategist for LaResistance during all those times when he was [[RichIdiotWithNoDayJob cutting class]]. Justified, since he goes out of his way to hide it from her and her IllGirl status (including the fact she's blind) means it's very difficult for her to investigate. Although, the fact that she is very good at recognizing voices (being blind) yet does not recognize Zero's voice as her brother's despite the digital distortion being very slight does make her fairly oblivious.
* Eve from ''LightNovel/{{Baccano}}'' is completely convinced that her big brother Dallas is a good person, despite increasing evidence otherwise.
* Sasuke from ''Manga/{{Naruto}}'' is unaware that Itachi killed his clan due to their planned coup d'etat so that the Hidden Leaf could be safe. When he found out, [[GoMadFromTheRevelation he did not]] [[DisproportionateRetribution take it]] very well.
* Yukina in ''Anime/YuYuHakusho'' doesn't know Hiei is her older twin brother.

* In ''WesternAnimation/Frozen2013'', Anna is convinced her [[NotEvilJustMisunderstood seemingly-evil older sister Elsa is just misunderstood]], remembering how close the two of them used to be when young, even when Elsa ends up looking ''really'' bad after seemingly ignoring Anna for most of their childhood, shooting ice spikes at Anna in the middle of an argument, and then promptly fleeing the kingdom, leaving the country in [[EndlessWinter a magical blizzard in July]]. She turns out to be right - most of the issues really are misunderstandings or even accidents.

* Gioffre of ''Series/TheBorgias'' doesn't seem to take any notice of the corrupt political world the rest of his family are embroiled in.

* In ''Disney/{{Frozen}}'', Anna is convinced her [[NotEvilJustMisunderstood seemingly-evil older sister Elsa is just misunderstood]], remembering how close the two of them used to be when young, even when Elsa ends up looking ''really'' bad after seemingly ignoring Anna for most of their childhood, shooting ice spikes at Anna in the middle of an argument, and then promptly fleeing the kingdom, leaving the country in [[EndlessWinter a magical blizzard in July]]. She turns out to be right - most of the issues really are misunderstandings or even accidents.

* In ''Disney/{{Frozen}}, Anna is convinced her [[NotEvilJustMisunderstood seemingly-evil older sister Elsa is just misunderstood]], remembering how close the two of them used to be when young, even when Elsa ends up looking ''really'' bad after seemingly ignoring Anna for most of their childhood, shooting ice spikes at Anna in the middle of an argument, and then promptly fleeing the kingdom, leaving the country in [[EndlessWinter a magical blizzard in July]]. She turns out to be right - most of the issues really are misunderstandings or even accidents.

* In ''Disney/{{Frozen}}'', Anna is oblivious to her older sister Elsa's ice powers until she exposes them at her coronation ball. This is justified, though: Anna ''used'' to be aware of them when they were kids, but Elsa accidentally injured her with her magic one day. As part of the healing process (as well as an extra precaution), the trolls treating Anna also wiped her memories of Elsa's powers.