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Submitted on
November 21, 2011
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Oddly colored hair (naturally or dyed) ie: blue, pink, streaked hair, "bottle red" (Think Rihanna)

Oddly colored eyes (and colored contacts) ie: red, yellow, pink, COLOR-CHANGING EYES

Unnaturally beautiful characters, ie: perfect proportions and complexions, etc.

Being an animagus or a metamorphous  (meta is very, very rare and ani is hard to achieve and  you have to be registered)

Being a half-breed creature, ie: half-veela, half-vampire, half-werewolf (or a werewolf, for that matter)

Having your character self-harm, ie: cutting, popping pills, etc. (This is a very over-done thing in oc's, and it's frankly not something healthy)

Having them dress in clothing outside the time-period (do your research)*

Having them be goth/emo/scene (seriously over-done)

Giving them tattoo's and piercing (they go to a boarding school in Scotland, seriously guys)

As just a general statement; "Scene",  and "Emo" fashions didn't start up until the mid-to-late 2000's. Mind your time periods when creating characters.

    *Wizarding clothing is more of a Victorian-influenced style (according to the movies and books), Muggle clothing would be early 1990's to late 1990's


Most clichéd romances for your oc to experience: Harry Potter, Draco Malfoy, Severus Snape, Remus Lupin, Sirius Black,  Fred and/or George Weasley, Ron Weasley, Neville Longbottom, Luna Lovegood, Ginny Weasley and Hermione Granger (basically, main characters. I'm not saying all of these romance stories are horrible. I've seen some wonderful ocxcanon pairings)

THE WORD OF JK ROWLING IS PRETTY FINAL; we know who marries who and who dies and such for the most part. Please stick to the storyline.

More clichés: having your oc sleep with a canon character, be raped by a canon character, dating/loving a teacher (anything past a crush), having a canon character's  baby, marrying a canon character, etc.

You can always make up your own love interest for the your oc, you can mold them into whatever you want and you're free to create your own storyline without having to worry about sticking exactly to the book.

Family and Friends:

Killing off your oc's parents is so overdone it's not even funny (~90% of all oc's I've seen are orphans)

Having Voldemort kill the parents is even more of a cliché

Having them grow up with horrible guardians or having them raise themselves is another big cliché

Having them be sexually/mentally/physically abused in their childhood is very cliché


Having them be closely related to canon character's is commonly overdone as well

If you're making them pureblood, do a little family tree research. I looked alot at family trees and such, and it helped me understand relations much better

If they are the child of any of the following, throw the character out and start from scratch: Severus Snape, Sirius Black, Remus Lupin, James Potter, Dumbledore, Voldemort and Hagrid

If they are friends with Draco Malfoy's crew then they are probably not going to hang out with the Golden Trio, and vice versa. It's just not very logical.


They are not on the Gryffindor Quidditch team while Harry Potter is attending school

No girls are on the Slytherin Quidditch team while Harry Potter is at school


Uniform violations are getting to be ridiculous (check out my uniform guides for info, posted below)

  No wands with Phoenix feather cores

Giving them a wolf/dolphin patronus is very overdone (no mythical creatures as well, like dragons and unicorns)

They cannot have a pet at school that is not an owl, a cat, a toad or a rat

Transfer students would be very unlikely (American and Japanese transfer students are so overdone)



possible the most clichéd house, "Brave, loyal, sometimes stupidly courageous, etc." Colors are Red/Gold, Boys cannot be in Girl's dorms.

Typically the "good" house, where all the heroes and heroines are. They might tragically die during the Battle of Hogwarts and then are later brought back to life.


Another clichéd house, "ambitious, cunning, etc.", Silver/Green colors, very blood-purist.

Typically, this is the "bad" house, full of the party girls/boys and the "rough" crowd. This is a split when it comes to the Battle of Hogwarts though. Either they're Death Eaters or they fight with the good guys and  almost die for a canon-character (usually Harry or Draco). Usually labeled as "misunderstood and emo/goth".


not as clichéd but it has it's few sues. Usually portrayed as the "nerd" house because it's full of intellectuals and people who love to learn. Colors are Blue and Bronze in the book and Blue and Silver in the movies.


The least-clichéd house. Very underrated house full of loyal, hardworking students.  Colors are Yellow and Black.

There are no other houses at Hogwarts besides these four, unless you count the fictional Mary-Sue house of  SparklyPoo (:

Okay, before everyone get's all up in arms over this let me just say that these are stereotypical things that I've seen. Just because your character has one of these traits doesn't mean I'm calling them a Mary Sue. My oc, Merope actually has a trait or two of the ones I've listed above, as does her love interest, Phineas.
Here are some tidbits to follow up on:

Hogwarts Uniform Guide: [link]

A Mary Sue Limitus test: [link]

A list of Pureblood families:
if anyone want's me to add something to this list, please tell me (:
Add a Comment:
chi-chan14 Featured By Owner Nov 25, 2014  Hobbyist
people can do really whatever they want for OCs....and phoenix feather isn't mary sue =-= its a legit core
AskShyShadowLinkette Featured By Owner Nov 22, 2014  New member Hobbyist General Artist
((Admin: Alright, my OC.
Name is Silver Yuusha
Age is 10 to 17
House is Hufflepuff
Family is her Brother Green, sister Aryll, Cousins Violet, Red and Blue, Grandmother and Aunt.
Hair colour is light brown, hints of blond
Eye colour is hazel with green flecks
Boyfriend (7th year onwards) is Dean Thomas
So, what do you think? ))
RigelIsUnappreciated Featured By Owner Nov 11, 2014  Hobbyist General Artist
Whoa, you seem really well-informed on this! I don't have any Harry Potter OCs that I'm working on currently, but I do have a buttload of original characters that could do with checking.... do you do Mary-Sue checks outside of HP OCs?
MrGamerGirl Featured By Owner Nov 6, 2014  Hobbyist General Artist
My character, Alice Triton, is in Hufflepuff, has a unicorn hair wand core, has a horse patronus, comes from half-blood heritage, is incredibly shy, owns a Cleansweep broomstick, and does well in her classes. She is also pretty, but not like DROP DEAD GORGEOUS, she's got that...innocent cutie vibe going. Is she a Mary Sue?
k8eroseg Featured By Owner Dec 3, 2014
I don't know about the maker of this check, but I don't think she's a Mary Sue. Alice sounds like a great character!
MrGamerGirl Featured By Owner Dec 4, 2014  Hobbyist General Artist
Thank you! Any tips?
NimbusBlack Featured By Owner Nov 5, 2014
My OC is a werewolf, and the daughter of Sirius, but I wouldn't say she is a Mary-Sue... She is also a gryffindor, but only because she really is brave... Her patronus is a wolf, but she is a wolf? Is that bad? Should I just throw her away? This made me feel insecure about all my writing...
AbsentMindDeviant Featured By Owner Edited Sep 28, 2014  Student General Artist
Here's a few things I think  might make my OC a stu.

He is an Arabian transfer student from North Africa

His name is Laith Minyar, Arabic for Lion of Dawn

His patronus is a lion

I think his house is obvious

He also uses a flying carpet rather than a broom, although he own one

He hails from a long family line if treasure hunters, that's why he can be count as one of the rich students

He love setting things on fire

He knows how to cast the torture curse, but never used it on a humanoid target before

So what do you think?
Melacollina Featured By Owner Sep 10, 2014  Hobbyist Writer
You do realize that this is fanfiction, correct? Which means that the writer can alter the story to suit their needs? If we wanted to read about Harry Potter ... We'd read the books. Some people want to explore the world of Hogwarts through different eyes and that does not mean they have to follow the plot of the books/movies to a tee. It's boring; we know what happens.

I don't like OCs that are Mary Sues but I don't have a problem with someone switching the story to suit their needs (ie. a character falling for Snape or Dumbledore).
takanahyuga Featured By Owner Edited Aug 26, 2014
i meeean... if a person has an OC they can make their own story n all, i agree with most of your points but putting an OC in a story already changes the plot and some may want to leave the whole idea unchanged but some may want to put something of theirs to the story, but that story is already theirs. ALSO why cant the OC have a wand with phoenix feather core??? Having a wand with phoenix feather core isnt all that rare, maybe cliche a little BUT i have seen tons of people with phoenix feather core on Pottermore and its not like they chose that wand. THE WAND CHOOSES THE WIZARD, not the other way around
(apologies for any mistakes i have made, english isnt my native language)
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