Outnumbered Sibling

This trope is what results when a character has a particularly large number of siblings, and they're the only boy/girl. This can often result in the character hoping and praying for a sibling of their gender, Parental Favoritism in either the character's or all the other's favor, and the character feeling either superior or inferior to the rest. More often then not, said character is either the youngest or the oldest of them all.

Subtrope of Massive Numbered Siblings. See also The Smurfette Principle and I Have Brothers.

Highly expect Annoying Younger Sibling and Big Brother Bully to come into place.

Examples of Outnumbered Sibling include:

Anime and Manga

• Sister Princess. An orphan named Wataru Minakami discovers that he has 13 sisters, one of whom is The Mole, and not actually one of his sisters.
• Quatre Raberba Winner of Gundam Wing is the youngest child of his family and has twenty-nine sisters (unless one counts Frozen Teardrop, where another one shows up and she's younger than him). The catch is that all of his sisters are test-tubes babies due to difficulties with childbirth in space among early space colonists; Quatre was the only child born naturally, although his Ill Girl mother died during childbirth and the fact that he wasn't artificially reproduced was kept secret from him (probably so he wouldn't blame himself). However, Quatre is shown to dearly love his sisters (and the one shown onscreen, a Hospital Hottie named Iria, loves him back and tells him the other ladies do too) and it is her near death (along with the death of their father) which drives poor Quatre over the edge.
• In Demon Slayer: Kimetsu no Yaiba, Kanao only had brothers. And they were all mistreated to terrible degrees by their cruel parents, to the point some of the boys died for it.
  • Obanai Iguro not only had sisters, but was the only guy in his whole family. For quite the reason: all the baby boys in the clan are sacrificed to their benefactor, a snake-like demoness. Obanai was only (temporally) spared because of his Mismatched Eyes, which she found beautiful.
  • Kagaya and Amane Ubuyashiki have quintuplet kids, and the third one (Kiriya) is The One Guy.
  • Implied in regards to Mitsuri Kanroji. She's the eldest daughter in the family, and the only sibling of hers seen onscreen is the brother who was born after her.
• Tasuki from Fushigi Yuugi is the only boy and the youngest child in his family. And his sisters are terrifying, according to him.
• In Ice Revolution, Masaki Oosawa is a massive Tomboy because her mother died when she was a little girl and she was raised by a widowed dad alongside two brothers.

Comic Books

• Hope O'Dare from Starman has four brothers. She and her brothers are all cops and it's mentioned that she is the one everyone is frightened of.

Fairy Tales

• In The Six Swans and its variations, the protagonist is the only girl and the youngest of seven siblings.

Film - Animated

• Thumper from the film Bambi has five sisters, which is reduced to four in the midquel.
• Played With in Brave: Princess Merida is the oldest child and the only daughter of the royal family, with three younger triplet brothers. However, the main conflict of the film seems to be that Merida herself (who's adored by their little bros) is a Tomboy being forced into a ladylike role by her well-intentioned but very strict Almighty Mom.
• At the end of Lady and the Tramp the title dog couple become the parents of three daughters (all Cocker Spaniels like their mother), and a fourth male puppy named Scamp (who is an indeterminate breed like his father).
  • The exact same is true with Doppler and Amelia's children from Treasure Planet.

Film - Live-Action

• Roberta from Now and Then had three older brothers and no sisters. The brothers are only briefly seen but it explains why she's such a tomboy.
• An Our Gang short illustrates this trope with a hint of Values Dissonance. Mickey is picked on by his two sisters and hopes that the baby his mother is pregnant with is a boy. Somebody tells him that every fourth child in the world is born Chinese. He's upset by the idea of having a Chinese younger but eventually comes to accept it. Unfortunately from his point of view, his mother gives birth to another girl.
• Adam Sandler's character in Punch Drunk Love.

Literature

• Ginevra "Ginny" Weasley of the Harry Potter series not only is the only girl in a family of seven children, but she's the youngest too. It's implied that she feels pressured about it, since her mother Molly loves her boys but desperately wanted a girl.
• Mark in Edward Eager's Half-Magic and Magic by the Lake. He is the only boy in a family of four children and his frustration with this is a occasionally a plot point.
• In the Vorkosigan Saga, Ekaterin has several older brothers and no sisters, and this is mentioned as being common among Barrayarans of her generation as the result of newly-obtainable sex-selection technology. In contrast to all the tomboyish examples of this trope, she specifically mentions this as being part of the reason why she's a Shrinking Violet.
• In The Bible, Jacob has twelve sons - and one daughter, Dinah. Though in some Jewish sources each of the sons, and Dinah, came with a twin sister.
• Horton Hears a Who: The mayor of Whoville has 96 Daughters and one son, Jojo.
• Flopsy, Mopsy, Cottontail, and Peter Rabbit.
• In the Malloreon, Belgarion and his wife are long-lived, and it has been prophesied that he would only have one son.
• Jenna Heap from Septimus Heap is the only girl in a family with seven boys, and the youngest child as well.
• Posy from The Hunger Games has three older brothers.
• In Jack and Jill, Janey "Jill" Pecq's close friend Merry Grant is the only daughter in her family AND her three brothers are implied to be quite older than she is. Though it does come with some perks.

Live-Action TV

• Tends to be mentioned as the background of tough female cops, such as Jane Penhaligan from Cracker and Kate Todd from NCIS. The idea being that their reason for seeking to compete in an all-male world is from attitudes gained in their childhood.
• Another "tough female cop" example is Jo Lupo from Eureka.
• In the Dollhouse episode "The Target", Echo's persona is implied to have this in her fake backstory; when Boyd asks her if she knows how to use a gun, she replies with, "Four brothers, none of them Democrats."
• Theo from The Cosby Show was the only boy in a family of five kids, but doesn't seem too bothered by it.
• This is the basic premise behind the shortlived sitcom Odd Man Out: a teenage boy has three older sisters and no brothers.
• Daphne from Frasier has... what is it? Six brothers? She talks about them a lot.
• Amy Santiago in Brooklyn Nine-Nine is the youngest of eight and the only girl.
• Morgan Matthews on Boy Meets World once her mother gives birth to baby Joshua.
• Simon Camden on 7th Heaven fears being this when his brother Matt goes off to college, leading him to pray for the twins his mother is pregnant with to be boys. His prayers are answered.

Video Games

• Wendy O. Koopa is the only girl of the Koopalings in the Super Mario Bros. games.
• Fire Emblem:
  • Ingrid Brandl Galatea from Three Houses and Three Hopes is the only girl in her family, and her brothers are implied to be much older than her. Even more so, she's the only one who inherited their family's Crest.
  • In Engage, Marni also was the only girl among her siblings. And her mother only wanted sons, so she mistreated the girl and then abandoned her.

Web Comics

• Surama from Wurr has four brothers and no sisters, and three of them are older than her.
• Summer Winters from Moon Over June traces her misandry to growing up with three older brothers and three younger brothers.

Western Animation

• Pictured above: Wendy Corduroy from Gravity Falls and her younger brothers Marcus, Kevin and Gus.
• It's not "massive" but on The Simpsons Bart occasionally has pangs of this, as the boy with two sisters and no brothers. One time he went to an orphanage and got himself an orphan to be a brother to. Said orphan was later adopted into a family of six sisters, much to the boy's horror.
• In The Smurfs there is Papa who has 100 sons and one daughter, Smurfette (who wasn't even "created" by him). Later, the Smurfs create another sister called Sassette.
• Lor from The Weekenders has so many brothers that she loses count of how many there actually are.
• Meg Griffin from Family Guy has two brothers, Chris and Stewie.
• Lincoln Loud from The Loud House has ten sisters.