(Requested by @Arthias_Pendragon) 

Name: Djeeta Mysidia

Titles: Princess of Mysidia, Saint of the Lagoon, Dominant of Leviathan, and Lady of the Whorl.

Age: 17

Hair colour: ocean blue

Eye colour: cerulean

Gender: female

Appearance:

Likes: Mysidia, training, hunting, fishing, swimming, the oceans, helping people, peace and quiet.

Dislikes: Perverts, slavery, betrayal, liars, monsters, dark guilds, villains, Waloed, Dhalmekia, Sanbreque, Iron Kingdom, Ultima, Acnologia, and half-hearted resolve.

Family relatives: King Doga Mysidia (father), Unei Mysidia (mother), Sarah Mysidia (elder sister), Cecil Mysidia (oldest brother), Gran Mysidia (older twin brother), and Citizens of Haven Village (distant descendants)

Powers and abilities:

Superhuman: Speed, strength, agility, reflexes, durability, stamina, and versatility.

Accelerated Healing Factor

Water Magic

Ocean Dragon Slayer Magic: Dragon Force, Ocean Dragon King Mode

Transformation: (Priming or Semi-Priming)/Limit Break

Eikon: Leviathan

A little background information about Lyria and Djeeta: Both of them lost their families, homes and people to Acnologia, and were rescued by Anna Heartfilia. They were sent to the future alongside the other Dragon Slayers, where they ended up near Sanbreque.

At first, they served Sanbreque when they learnt that it was founded by survivors of Camelot. But they soon discovered the truth of Sanbreque's ideals and methods, and quickly fled the country before they could be enslaved.

They eventually arrived at Haven village on the continent where the Kingdom of Mysidia once existed, and have been living there ever since. 

And that's all for Leviathan's Bio. A good idea to make it easier if for the Dominants would also possess Lost Magic of their own, like Y/N being a Fire Demon/Devil Slayer or Shiva's Dominant wielding either Ice God Slayer Magic or Time Magic. 

Let me know what you guys think at the comments below, peace out and enjoy!