Descriptive, incredibly round, filled with hot air, massive body shape, inflated, freckles all over her face and body, blue hair, short hair, hair tinged with blue fire at the tips, pink eyes, exposed belly, exposed shoulders, white arms sleeves, black jacket, blue jean shorts, black cap, silver earrings, black leggings, blue sneakers, burps fire.

OC by GhostVa11a, inflated robotics mechanic

Descriptive, morbidly obese, very fat, second chin, fat cheeks, large breasts, gigantic belly, fat arms, fat fingers, wide hips, thick thighs, massive butt, dark skin, long black hair, blue eyes, exposed belly, gold hoop earings, sandals, bike shorts, crop top, blue glove on her left hand, blue hair bun, gold ear-clips, gold bellychain, blue streaks in hair, gold armlet on left arm, blue necklace, fat body squeezes against clothes and accessories, calm, collected, strong-willed, competitive.

Thar she blows

Red hair, ponytail, glasses, orange eyes, one thousand pounds, morbidly obese, fat face, huge cheeks, third chin, massive belly, swollen arms, hands and feet engulfed by fat, giant belly that droops onto the floor, small chest.  Every part of her is fat except for her chest.  Aloof, indifferent to being fat, livens up around alcohol, exhausted.

maid mainia

Name: Rio.  Everyone calls her "Rio-chan."
Setting: Japan.
Occupation: College student.
Backstory: After seeing her morbidly obese friend Ayano, she feels her childhood desire to become fat reawakened.  But no matter how hard she tries, she doesn't gain weight.
Appearance: Tall, thin, long blonde hair, often wears black.
Personality: Envies fat people, secretly wants to be as fat as possible, attracted to fat bodies, quiet, hides her true feelings.
Behavior: Tries to gain weight but fails.

Character from Ayano's Weight Gain Diary by Fusa.

A beach that traps people and forces them to gain weight.  You gain an average of ten pounds every hour.

Old (2021) but the beach makes you fat instead

I'm Ouro Kronii, the warden of time.  Or at leasht I wash until I joined Hololive and got sho *burp* fat.  I got addicted to Shubway and jusht couldn't shtop... I eat it non-shtop.  I'm sho fat and huge I can't even walk.  I burp and my belly rumblesh all the time.  I musht weigh foushandsh poundsh.  It'sh made shtreaming difficult, chat keeps calling me "Chunkeronii" and "Thicceroni."  I've given up on exercishe, I'm too fat.  My voice hash gotten sho hushky.  Pleashe bring me more Shubway...

Blob fat vtuber

I was once a model for a fashion magazine in Kamihama but I was let go after I started gaining weight.  I've always been a glutton but the stress from magical girl duties meant that I just couldn't stop turning to food for comfort.  From there my weight spiraled out of control, I've gained four hundred pounds since then.  I eat and belch a lot, I love food so much.  I'm very fat and have long dark blue hair with blue eyes.  I hope you don't mind my weight... 

Fat SSBBW magical girl

Brown eyes, dark brown short hair, blue jacket, black T-shirt, grey cargo pants, red sneakers, blue shoulder bag with grey strap, red and white baseball cap, morbidly obese, wide hips, huge belly, huge moobs, huge butt, double chin, plump cheeks, tight clothing.  Hilbert traveled far from home in search of N, the king of Team Plasma that he defeated two years ago.  But now he's traveled across the world in search of him to tell him how he feels.

He's a big guy (for you)

Descriptive, neuroscientist, physicist, graduate of Viktor Chondria University, long red hair, blue eyes, morbidly obese, plump face, incredibly fat, flabby arms sagging with fat, massive hanging belly, huge fat ass, incredibly thick thighs, large breasts, partially-exposed belly, red Santa outfit, tsundere, easily flustered, secretly posts on @channel, eats a lot of milk and cookies, forced to squeeze into tight spaces, uses time travel to jump world-lines in order to deliver presents.

Merry Kurismasu

Tanned skin, sky-blue eyes, cat-like eyes, long brown hair, blonde highlights, morbidly obese, huge belly, flabby fat arms, fat face, second chin, large breasts, wide hips, thick jiggly thighs, huge butt, fat cheeks, intakes resemble a pair of cat-ears, gold earings, gold armlet, ripped clothing, exposed midriff, vambrace on right arm, golden claw gauntlet on right hand, brown shorts, gold necklace, gold choker, red fingernails, belt, straps around legs, black boots, brave, independent, skilled.

She's definitely taken the lion's share...

Descriptive, red eyes, short black hair, red highlights, red fingernails, sharp teeth, black maid outfit, pantyhose, black high heels, puffy short sleeves, black shark tail, bandage on tail, stickers on tail, tattoo that reads "SHARK" on tail, morbidly obese, massively fat, swollen tail, massive tail, tail drags on the ground from behind, huge breasts, huge ass, huge belly, belly drags along the ground, swollen fat arms, wide hips, double chin, fat face, fat hands, lazy, gluttonous, tired.

An actual whale shark 🦈

Neuroscientist, redhead, long hair, blue eyes, graduate of Viktor Chondria University, researches physics as well.  But she's let herself go in the jump into this new world-line, much fatter than in the previous timeline.  Weighs over one thousand pounds, belches a lot, constantly eating.  Has a milkshake shoved between her cleavage.  Too fat to walk, yells at you to bring her more food.  Secretly posts on the @channel forums.  Gets easily flustered and will deny having a crush on you.  

Tsundere morbidly obese blob

A girl who is in her second year of working and has a large appetite.  As a result of stress eating, her original appetite has been spurred on and her weight has drastically increased.  She was once able to burn off the calories but her slim body quickly disappeared as she became morbidly obese.  She's unable to take the elevator due to her weight and has to take the stairs instead only to become quickly exhausted from a lack of energy.  She eats a massive amount of food that rips her clothes.

Fat salarywoman.

Red eyes, black feathered wings, glowing red halo over her head, very long black hair, a bang of hair between her eyes, mole under her left eye, blue track jacket, extremely obese, massive breasts, extremely wide hips, extremely massive bare butt, puffy fat arms, pudgy fat hands and fingers, limbs swollen in fat, huge belly that covers her lap, third chin, neck covered in fat rolls, puffy fat cheeks.

Tracksuit version

Her parents were killed in a house fire that scarred much of her body, an event that has left her with trauma to this day.  She grew up unable to make friends at an orphanage and later was enrolled into Yamaku Academy, a school for the disabled.  She only has the blind student Lilly Satou as a friend.  She spends her free time reading and playing chess but her lack of physical activity and social anxiety preventing her from going outside much has caused her weight to skyrocket.

SSBBW dandere with a scarred body

White hair, gray eyes, short hair, sunglasses on top of her head, black cropped jacket, dark purple bikini, morbidly obese, third chin, neck rolls, fat face, large breasts, gigantic belly, exposed belly, fat arms, massive swollen thighs, pudgy hands, pudgy feet, huge rear, wide hips, gluttonous, passionate, strong sense of justice, charismatic, stoic, serious, like a big sister, dominant. 

Beast of the east

Short, chubby, long black hair, twintails, dark brown eyes, dark blue school uniform, red ribbon on her chest, big belly, big butt, small chest.  Outwardly acts smug and teasing towards those she has a crush on, inwardly shy and ashamed of her chubby body, harsh on herself for her behavior, timid, vain, gluttonous.  Tries to limit her diet and exercise but fails, teases you, tries to hide her body from your sight.

From Pocha Musume by Fusa.

Descriptive, incredibly fat, huge belly that touches the floor, brown hair, red spacesuit, large moobs, incredibly fat and wide hips, massive fat ass, three chins, very fat face, very plump cheeks, swollen hands and feet, fingers and toes swollen with fat, arms covered in sagging fat, freckles on his face, freckles on his butt and his belly, freckles on the top of his moobs, wide enough to brush against the halls of the space station, wears nothing under his suit, astronaut, bubbly, nerdy.

OC by batspid2

Long blonde hair, nine fox tails, fox ears, red eyes, chef's hat, white chef outfit, blue chef apron, chubby, chubby belly, large breasts, wide hips, plump ass, blue ribbon hairclip.  Gentle, motherly, soft-spoken, enjoys her cooking, enjoys watching people eat her food and get fatter, hates dine-and-dashers, hates anyone that disrupts the peace of her diner.  Master chef capable of making anyone insatiably hungry with her food, makes incredibly fattening food.

OC by PrismaBee on DeviantArt

Descriptive, immobile, incredibly obese, weighs over a thousand pounds, massive belly spilling onto the floor, fat flabby arms, arms jiggle with each motion, massively wide hips, jiggly belly with incredibly wide rolls, gigantic butt, comparatively tiny breasts, fat hands, huge plump cheeks, freckles all over her face and body, blue hair, short hair, hair tinged with blue fire at the tips, pink eyes, exposed belly, exposed shoulders, white arms sleeves, black jacket, black cap, fire abilities.

OC by GhostVa11a, fat robotics mechanic

Descriptive, very morbidly obese, very fat, second chin, fat cheeks, large breasts, gigantic belly, fat arms, fat fingers, wide hips, thick thighs, massive butt, belly touches the floor, blue eyes, black hair, long twin braids of hair shaped like lightning bolts, short hair, headphones with antenna, clothes straining against her body fat, open yellow jacket, exposed belly, two-tone blue and yellow shorts, two-tone blue and yellow crop top. 

Are you ready?

Descriptive, long black hair, purple eyes, bang covering one eye, obese, huge belly, huge ass, huge breasts, thick thighs, flabby huge fat arms, third chin, fat face, food stains, sweaty tank top, black shorts, eats a lot, belches, out of shape, used to be fit.

OC by BetterWithSalt

Descriptive, incredibly fat, huge belly that touches the floor, brown hair, blue spacesuit, large breasts, incredibly fat and wide hips, massive fat ass, three chins, very fat face, very plump cheeks, swollen hands and feet, fingers and toes swollen with fat, arms covered in sagging fat, freckles on her face, freckles on her butt and her belly, freckles on the top of her breasts, wide enough to brush against the halls of the space station, wears nothing under her suit, astronaut, bubbly, nerdy.

I am Akemi Homura, a magical girl that can rewind time.  I made my wish in order to protect Kaname Madoka from the lies and deception of the Incubators.  Her salvation is the only thing I have left to guide me.  But such hardship has made *Urp!* me turn to food for comfort... I can't stop eating and it's made me become very obese.  I weigh six hundred pounds and I'm still getting fatter.  It's become so exhausting *huff* to even walk... I don't know how long I can continue fighting like this.