Casting Shadows (Supernatural Fanfiction)

Alex isn't your average girl. Although she lives with her foster parents and goes to university, she never really fitted in with the humans, because well, she isn't. She had no idea who her birth parents were until she meets the Winchesters. At first she didn't believe it, but who would? After she thinks the situation with her father is sorted she joins the road with the Winchesters and helps them saves lives, along this the occasional help of Castiel. Little do they all know that her father is still alive and is not happy with this....
He sends an old friend of his to sort things out for him but thing don't go to plan. Maybe when they say "they don't feel" is not all true.

Who is Alex's real father?
What happens when they meet?
Why does he not like her with the Winchesters?
Who is his old friend who can feel emotions?
What will happen?

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I wanna say a massive thank you to @Bringmethebandships for making this amazing cover! Go check her account out she's a really amazing person!