Princess Eris Sparkle
'We have to overcome the barriers that appear in our lives, everything has a solution!'
Nickname(s): Eris,Er
Gender: Female
Species: Draconequus (half-shark)
Physical/Appearance: She is very tall, she has horns, and her head is of a horse ( with shark's teeth) . She has lion's paws (with a kind of fin before the elbow), legs of horse (with fins too).She has a dorsal fin, tail ( of a shark),and gills. She has scattered scales in her body.
Parents: X
Siblings: Comet , Mid(Half brother),The twins(Half Siblings),Love(Half Sister),Hercules(Half brother) and Nebula(adoptive brother)
Residence: Ponyville
Cutiemark/Special Talent: She has facility to make new friends and she is a good swimmer
Age: 17 years old
Favourite colour: Purple and Black

Favorite food: Chocolate especially when it has nuts, and fish.
Relationships:
Twilight- Their relationship is complicated, Twilight got crazy when she became pregnant of Eris, and when she was born, Twi kicked out her kids along with Discord, not caring about their lives . After that, they never met again,so Eris don't likes twilight because she was unfair.
Discord- They have a great relationship, they are very close friends because of the events.
Fluttershy- Fluttershy is considered the true mother mother to Eris because she was close when Eris needed, they are best friends.They live together since Discord married Fluttershy.
Comet- They are very friends, they always tell you their secrets.Comet always protects her.
Love-They have a great relationship, they are best friends.
Hercules- Eris is a great big sister to him, they get along very well and Eris advises him very well!
Nebula- They are adoptive siblings, but they still love to get together and have fun doing sports.
Mid -They do not have a perfect relationship, but until they are friends. They talk a little bit because Mid is currently moving to the city of Eris, so in future they will be more 'United'.
The twins- In fact, Eris does not even know that the two exist because she have never spoken to her real mother, but I think if they met they would be friends.
Clay - They have a crush on each other, have kissed at parties but at the moment their relationship has to wait since Clay has to go on an important trip
Sun - He was Eris's first love, but today, Eris likes another, so Sun has already given up and is enjoying life (going to parties, etc.)
Personality/Note:

She is friendly with ponies, but in the point of view of the fish,she is a threat.
Many ponies are afraid of her because she is very big and she has sharp teeth, but she would never hurt a pony.
She is dramatic,impatient,funny and she's a pony that irritates herself very easily.
As she is half-shark,she can't stay for two hours without contact with water, otherwise she does not reason right and gets weird.
Another thing I added: she has powers to control water.She can cry and not leave her face marked,this further facilitates her movements in the water.
Discord gave her that name because he thought that she would be the next Draconequus who would spread chaos, but the most she can do is : swim in the open sea and scare pony with her dorsal fin, but she can not do this much time and she forces herself to apologize.
Eris suffered a lot when she was young because after she born, her mother abandoned her with her father and her brother to stay with Sombra (actually,Sombra bewitched Twi,but I'll talk about it in the future).Her Salvation was Fluttershy, that welcomed her.
She lives with her father Discord and his stepmother Fluttershy along with siblings.
Eris will always be a 'child', this is her personality, but she has the goal of being more mature in some situations.
Ancients references:fav.me/dbv8lbr , fav.me/dbo84xt and fav.me/dbfjfdm
Update: I changed her style because she was very 'common', she did not have many special things.I prefer her like this,I can add more information about her like : now she has 'water powers'!
I'm sorry for the inappropriate use of words and these things, I still do not know English very well.
If you have any suggestion, please comment!

Thank you so much! <3
I was in doubt if I added this detail, but I think I made the right choice :3

you're welcome! and yep, you did the right choice >v<!