The Demigod Sister of a Mortal and Witch (ON...
Eliza Evans, the youngest sister of Petunia and Lily Evans. While Lily is a witch, Eliza is a demigod, and Petunia a normal human, or muggle/mortal. While Lily goes to Hogwarts, Eliza goes to Camp Half-blood and Petunia stay's in London. Petunia saw Lily and Eliza as freaks, their parent's saw them as blessings, Eliza being a child of Poseidon, and his only daughter, she had auburn hair, and sea green eyes. Her hair came from her mother, her eyes came from her father.
In 1980 her nephew's are born. Harry Potter and Dudley Dursley, while she is not married, or thought about it, she is also thinking about joining the Hunters. That is until she see's a old 'friend' Severus Snape, on October 31 when she was gonna surprise her sister and brother-in-law with a visit. She saw her sister's husband's body, James Potter, dead on the floor, she also saw this man, with long black hair, sobbing over her sister's body, and a one year old boy crying.
What will happen to Eliza? and what will happen to her nephew Harry?
"Let's start over, I'm Severus Snape, it's nice to meet you."
"My name is Eliza Evans, it's nice to meet you too, Severus."
Little did they know, those words would change their lives.
"Promise that you'll be by my side?"
"Now, and Forever."
(It'll probably be bad, so don't expect much)