Brother-Sister Relationships FanFiction

Ties and Glasses

Ties and Glasses

Gen
G
Updated
13.04.2025
Fandom
Harry Potter - J. K. Rowling Original Work
Characters
Original Female Character(s), Original Male Character(s), Original Male Character & Original Male Character, Original Male Character & Original Female Character
Tags
Spanking Hurt/Comfort Discipline Disciplinary Spanking Brother-Sister Relationships Non-Sexual Spanking
Harry Potter Universe - Original Characters OnlyMM+MF, purely sibling bonds, no romanceThree main characters:Sven Wilder & Ryder Everhart & Violet EverhartAKA "The Green-Eyed Trio" (?)Mixed POVs, "-" indicates a switch in perspective.
领带与眼镜

领带与眼镜

Gen
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Original Work
Characters
Original Female Character(s), Original Male Character(s), Original Male Character & Original Male Character, Original Male Character & Original Female Character
Tags
Spanking Hurt/Comfort Discipline Brother-Sister Relationships Non-Sexual Spanking
*HP/哈利波特世界观原创角色*MM+MF，纯兄妹无骨无爱情*三主角，箭头是↓赛文·维尔德 Sven Wilder x 莱德·艾弗哈特 Ryder Everhart x 薇尔莉特·艾弗哈特 Violet Everhart*字数约9k*又名《绿眼睛三人组》（？）*视角混乱，"-"代表切换人物视角
Chocolate and Honey

Chocolate and Honey

F/M
M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Sirius Black/Remus Lupin, James Potter/Lily Evans Potter, Remus Lupin, Sirius Black, James Potter, Peter Pettigrew, Lily Evans Potter, Mary Macdonald (Harry Potter), Marlene McKinnon, Lyall Lupin, Severus Snape,
Tags
Unrequited Love Other Additional Tags to Be Added I'm Bad At Tagging Marauders Era (Harry Potter) POV Remus Lupin Requited Love Remus Lupin & Lily Evans Potter Friendship I'm Bad At Titles Werewolf Remus Lupin Protective Remus Lupin Remus Lupin Has a Sibling Brother-Sister Relationships
Nora Lupin was used to doing things herself. After all, her brother did have a "furry little problem."Remus Lupin loved his sister, and would do anything in his power to protect her from pain.
Glenval Cay (being rewrtitten)

Glenval Cay (being rewrtitten)

F/F
F/M
M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Regulus Black/James Potter, Sirius Black/Remus Lupin, Mary Macdonald (Harry Potter), Lucius Malfoy, Molly Weasley, Arthur Weasley, Marlene McKinnon/Dorcas Meadowes, Bellatrix Black Lestrange/Rita Skeeter, Barty Crouch Jr./Evan Rosier, Sybill Trelawney, Pandora Lovegood/Lily Evans Potter,
Tags
Pining Not Beta Read Alternate Universe - Muggle Regulus Black & Sirius Black Have a Good Relationship Regulus Black is a Little Shit Fake/Pretend Relationship Fake Marriage Sister Complex Sisters Cousins Brothers Poet Regulus Black
Is Bellatrix Black's engagement to Rodolphus Lestrange purely love? Or is it arranged?Sirius Black, the newest runaway, and in just five years?Find out more in the newest issue of the Daily Mail!"What a load of bull," Narcissa muttered as she read th...
Reborn to the Uchiha Clan

Reborn to the Uchiha Clan

F/M
M/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling Naruto (Anime & Manga)
Characters
Harry Potter, Sirius Black, Hatake Kakashi, Uchiha Itachi, Uchiha Obito, Namikaze Minato, Sarutobi Asuma, Other Naruto Character(s), Sarutobi Hiruzen, Nara Shikaku, Uchiha Fugaku, Uchiha Mikoto,
Tags
Slow Burn Family Fluff Original Character(s) Misunderstandings Slow Build Slow Romance Panic Attacks Healing Family Feels Adopted Sibling Relationship Brother-Sister Relationships Uchiha Clan (Naruto)
I don't think it needs this summary. The title says it all. Harry Potter is renamed Masaki Uchiha, and he has to deal with a lot of shit to even get things to stabilise. Learning these world rules is difficult as hell. Raising three little sisters is...
Wild hearts

Wild hearts

F/M
G
Updated
14.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Hermione Granger
Tags
Childhood Friends Dubious Morality I'm Bad At Tagging Near Death Experiences Dark Harry Potter BAMF Hermione Granger Soul Bond Dark Magic Slytherin Harry Potter This Is Not Going To Go The Way You Think Master of Death Harry Potter Slytherin Hermione Granger
Fae Blood runs through her veins, something else runs through his. The old magic's demand a sacrifice. Harry and Hermione are brother and sister in every way except blood.The Fates are having a laugh, drinking their tea watching. Lady magic is huffin...
all the devils are here

all the devils are here

F/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling Harry Potter and the Cursed Child - Thorne & Rowling
Characters
Original Female Character(s), Harry Potter, Ron Weasley, James Sirius Potter, Scorpius Malfoy, Albus Severus Potter, Scorpius Malfoy/Albus Severus Potter, Teddy Lupin, Original Lestrange Characters (Harry Potter), James Sirius Potter/Original Female Character(s), Albus Severus Potter & Original Female Character(s), Teddy Lupin & James Sirius Potter,
Tags
Enemies to Lovers Slytherin Good Slytherins Pureblood Culture (Harry Potter) Pureblood Politics (Harry Potter) Pureblood Society (Harry Potter) Slytherins Being Slytherins Slytherin Politics Not Harry Potter and the Cursed Child Compliant Brother-Sister Relationships Gryffindor vs. Slytherin Rivalry Protective Slytherins
James Sirius Potter has plans for his life, graduate Hogwarts, become a star quidditch player, and just maybe get a girlfriend. None of those plans accounted for a cold Slytherin with eyes like lilacs to catch his gaze. This is his seventh year, ther...
Different choices

Different choices

F/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Sirius Black, Ginny Weasley, Nymphadora Tonks, Albus Dumbledore, Harry Potter/Ginny Weasley, Andromeda Black Tonks, Andromeda Black Tonks/Ted Tonks, Ted Tonks, Harry Potter & Ginny Weasley
Tags
Developing Relationship Siblings Voldemort is Defeated in the First Wizarding War (Harry Potter) Brother-Sister Relationships Baby Harry Andromeda raises Harry Potter Relationship later on
What if Sirius arrived before Hagrid and took Harry with him and took him to Andromeda and Ted Tonks, before he went to hunt down Peter, but he doesn't return.
Fictober 2023 | One day, one story

Fictober 2023 | One day, one story

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling Star Wars: Rebels Star Wars - All Media Types
Characters
Harry Potter, Thor (Marvel), Loki (Marvel), Anakin Skywalker & Ahsoka Tano, Ahsoka Tano, Anakin Skywalker, Obi-Wan Kenobi, Luke Skywalker, Leia Organa, Padmé Amidala/Anakin Skywalker, Obi-Wan Kenobi & Anakin Skywalker, Aizawa Shouta | Eraserhead,
Tags
Fluff Angst Brotherly Love Family Fluff Love Confessions Hurt/Comfort Idiots in Love Friendship Friendship/Love Love How Do I Tag One Shot Collection
Hello there!This is my take on this year's fictober! I hope you'll enjoy reading it as much as I enjoyed writing it!I explain everything about it in the first chapter!Thank you for reading! And my apologies if I make any mistakes, English is mot my f...
My brother(My sister)

My brother(My sister)

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Pandora Lovegood, Regulus Black & Pandora Lovegood
Tags
Fluff Angst Suicidal Thoughts Hurt/Comfort Platonic Cuddling Panic Attacks Brother-Sister Relationships no beta we die like Pandoras mom
she was only sitting at one of the picnic tables outside it was a nice dayit was supposed to be a nice day it was before she got the letter they letter saying her parents are deadthey had died in one of the death eater raids for the potions her mothe...
A Star & Moon need their Sky(I Missed you My Love)

A Star & Moon need their Sky(I Missed you My Love)

F/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Pandora Lovegood/Xenophilius Lovegood, Xenophilius Lovegood, Regulus Black & Pandora Lovegood, Sirius Black(mentioned), James Potter(mentioned), Pandora Lovedgood(Mentioned), Regulus Black(mentioned)
Tags
Angst Depression Father-Son Relationship Pain Grief/Mourning Hurt No Comfort Memories Suicide Brother-Sister Relationships author had their first therapy session today no beta we die like Xeno
The first death that had caused the first crack in his mind was Regulus's death, his dear star, the one who he sees as his son, and who he had thought would be the older brother to his and his darling Dora's kids.
My brother(A Super Nova)

My brother(A Super Nova)

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Pandora Lovegood, Regulus Black & Pandora Lovegood
Tags
Angst Implied/Referenced Suicide Implied/Referenced Character Death Grief/Mourning Platonic Cuddling Hurt No Comfort Crying Memories No Fluff Brother-Sister Relationships no beta we die like Pandora
It hurts, her brother is dead, Regulus Black is dead and she was not there to protect him, her sweet brother is dead, and he died alone and cold (Reggie hated the cold-)it hurts, as if someone has taken her heart from between her ribsit hurts as if s...
Resemblance

Resemblance

F/M
M/M
G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Gellert Grindelwald, Ariana Dumbledore, Albus Severus Potter, Albus Dumbledore/Gellert Grindelwald, Aberforth Dumbledore, Aberforth Dumbledore & Albus Dumbledore, Credence Barebone & Aberforth Dumbledore, Aberforth Dumbledore & Albus Dumbledore & Ariana Dumbledore, Aberforth Dumbledore & Ariana Dumbledore, Aurelius Dumbledore, Aberforth Dumbledore & Aurelius Dumbledore, Aberforth Dumbledore/Gellert Grindelwald,
Tags
Sad Pain Past Relationship(s) Childhood Memories Past Character Death Brotherly Bonding Brother-Sister Relationships
When Aberforth looks in the mirror he sees his brother.After all, they aren't that different.
Ignify

Ignify

F/F
F/M
M/M
Multi
G
Updated
15.04.2025
Fandom
House of the Dragon (TV) Game of Thrones (TV) A Song of Ice and Fire - George R. R. Martin
Characters
Arya Stark, Ned Stark, Robb Stark, Sansa Stark, Rickon Stark, Catelyn Tully Stark, Rhaegar Targaryen, Lyanna Stark, Rhaenys Targaryen (Daughter of Elia), Aegon Targaryen (Son of Elia), Jaime Lannister, Elia Martell,
Tags
Alternate Universe - Canon Divergence Eventual Happy Ending Targcest | Targaryen Incest (A Song of Ice and Fire) Direwolves (A Song of Ice and Fire) Female Jon Snow House Stark (A Song of Ice and Fire) Eventual Smut Tags Are Hard Female Harry Potter Reincarnation Aged-Up Character(s) Alternate Universe - Reincarnation
Her name is Visenya now, but it wasn't always before. Death calls this a second chance and she wants to laugh. A war of Kings becomes a war of Queens and, somehow, she finds herself carrying the bloody sword. Again.But she isn't the only one.Their na...
He was my sun you are my moon(The stars are so far away)

He was my sun you are my moon(The stars are so far away)

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Regulus Black, Pandora Lovegood, Regulus Black & Pandora Lovegood, Implied Regulus Black/James Potter
Tags
Angst Emotional Hurt/Comfort Platonic Cuddling Crying Heartbreak Platonic Soulmates Comfort Brother-Sister Relationships no beta we die like reggies love for james
Regulus hasn’t cried like this in so long he forgot how much it hurt to feel like you can’t breath like someone has taken your lungs and crushed them he can’t help but be thankful for Pandora being here
Unveiling Paths: Hermione's Journey to Self-Discovery

Unveiling Paths: Hermione's Journey to Self-Discovery

G
Updated
15.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Draco Malfoy, Ron Weasley, Hermione Granger, Neville Longbottom, Blaise Zabini, Luna Lovegood, Theodore Nott, Pansy Parkinson, Hermione Granger & Draco Malfoy, Hermione Granger & Harry Potter & Ron Weasley, Hermione Granger & Luna Lovegood,
Tags
Alternate Universe - Canon Divergence Ron Weasley Bashing idk - Freeform Pureblood Culture (Harry Potter) Lies Pureblood Hermione Granger Brother-Sister Relationships Harry Potter Bashing Found Friends
In "Unveiling Paths: Hermione's Journey to Self-Discovery," Hermione Granger's world is turned upside down when she uncovers a shocking truth about her identity. Kidnapped and raised in secrecy, she discovers her connection to a notorious Death Eater...
Mi AU

Mi AU

F/F
F/M
M/M
G
Updated
12.04.2025
Fandom
A Song of Ice and Fire - George R. R. Martin Harry Potter - J. K. Rowling Ben 10 Series
Characters
Severus Snape, Lucius Malfoy, Albus Dumbledore, Gellert Grindelwald, Ariana Dumbledore, Abraxas Malfoy, Original Character(s)/Original Character(s), Albus Dumbledore/Gellert Grindelwald, Aberforth Dumbledore, Aberforth Dumbledore/Original Character(s), Abraxas Malfoy/Female Tobias Snape, Eva/Sparda (DmC),
Tags
Fatherhood Father-Son Relationship Family Fluff Family Bonding Adoption Childhood Friends Adopted Children Mother-Daughter Relationship Sister-Sister Relationship Good Tom Riddle Parent-Child Relationship Mother-Son Relationship
esto es un archivo para mi AU.Aviso: Tengo mala ortografia.
hadrian sirius black

hadrian sirius black

Gen
G
Updated
17.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Sirius Black, James Potter, Lily Evans Potter, Severus Snape, Molly Weasley, Fred Weasley, George Weasley, Original Potter Family Characters (Harry Potter), Walburga Black, Sirius Black & Harry Potter, Harry Potter & Original Female Character(s),
Tags
Alternate Universe - Canon Divergence Absent Parents Alternate Universe - Everyone Lives/Nobody Dies James Potter Being an Asshole Major Original Character(s) Parent-Child Relationship Children of Characters Harry Potter's Name is Hadrian Brother-Sister Relationships James Potter is Not Harry Potter's Parent Harry Potter is Not the Boy-Who-Lived Harry Potter Has a Sibling
The Boy-Who-Lived was still born on July 31st, 1980 to Lily and James Potter, but his name was not Harry - it was Charlus. Hadrian 'Harry' Black was born three years prior, on October 31st, 1977, to Sirius Black and Lily Evans - an event which set in...
The untold story - Harry Potter AU

The untold story - Harry Potter AU

G
Updated
17.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Harry Potter, Ron Weasley, Hermione Granger, Original Muggle Character(s), Original Potter Family Characters (Harry Potter)
Tags
Protective Siblings Other Additional Tags to Be Added Tags May Change Tags Contain Spoilers Alternate Universe - Harry Potter Setting Obliviate | Memory Charm (Harry Potter) Spell Failure Brother-Sister Relationships Spell Creation (Harry Potter)
Everyone assumed the Potters only had one child, but what if they don't? What if someone long forgotten reappears? People from the past knew her, but no one in the present has ever seen her. How is that possible?
¡¡Esto definitivamente no estaba en el libro!!

¡¡Esto definitivamente no estaba en el libro!!

Multi
G
Updated
18.04.2025
Fandom
Harry Potter - J. K. Rowling
Characters
Original Characters, Harry Potter, Minerva McGonagall, Severus Snape, Ron Weasley, Hermione Granger, Fred Weasley, George Weasley, Original Muggle Character(s), Albus Dumbledore, Harry Potter & Severus Snape, Original Non-Binary Character,
Tags
Alternate Universe - Canon Divergence Slow Burn Eventual Romance Domestic Fluff Self-Insert Original Character-centric Albus Dumbledore Bashing Good Slytherins Reincarnation Fred Weasley Lives Book 1: Harry Potter and the Philosopher's Stone Twins
Lara y Laila son gemelas idénticas como en su vida previa, tienen recuerdos de sus vidas pasadas y se dieron cuenta que habían renacido en el universo de Harry Potter. Al principio habían decidido no intervenir, solo observar y convivir con sus perso...