This is what my OC would have done.

Ok. Quick introduction.

Skyla
Female
Straight
Harry Potter's twin.
Very loyal. Reads a lot. Hides great use of language, how wise she is, and (for this mostly, but true) love for rap. Long black hair, Lily's (her mother's) green eyes, white. Greatly advanced in magic and knowledge. Her eyes of emerald fire are her number one clue she is tough and not one to cross. But she is kind when her emotions are not pulled to the extreme. Warning: emotional. Not like extremely sad, though she can be, her emotions are not to be toyed with. Her love for Harry defeats all closeness and love mankind know of. Even past their knowledge, Muggles and Wizarding alike.

Wow. I said quick. No need to read it all if you don't want to.

Skyla's reaction:

"Oh, vampires think they're so tough
So much they've got to learn
Being hot is not enough
When life takes that stormy turn.

Not all of us wanted something crappy
Nor a love story
With a attempt to be sappy
Poor you, is it too gory?

To be honest, I don't mind
All this hate and attention is normal
Don't make me mad, no teeth will grind
Remember to be formal.

Or did you leave your manners at Forks?

Dull old town, isn't it?
Really, its strange.
Now you know how I feel, just a bit
Though if I lived there, life probably wouldn't change.

Same old defeated dragon,
Same old poisoned mead.
Same old wand turned on (Lumos)
Did I ask what you need?

No. And I never will
I could fight forever
For people like Bill.
I'll fight for them all, but enemies? Never.

Lumos
Nox
Wingardiam Leviosa
Alohamora
Repelo Muggletum
Relishio
Crucio!"

Yeah, I needed that!

Skyla Potter, the forgotten twin♡~