The lost Winchester and angel

Arya has always look out for Harry since he was small, so one day she relaise Harry doesn't really look like much of James Potter, while he does have lily's shape of eyes, his green is a bit more brighter, like a emerlad, while Lily's eyes are more of a darker green.
so she does a parent-age test on Harry and herself.
she finds out Harry isn't a Potter at all, he is in fact a Winchester, and she had met them once, they were going to take her in if it hadn't been for Billy Becker stopping them.
but herself? she is the child of the archangel Gabriel, who used to play with her, and an seraphim called Castiel.
so the two look for them and the next two years in that world, and two months in Harry's world, it's the bets thing.
but Harry is Austic, so sometimes it can be hard, but to Arya, it's worth it.
but will the wizarding world leave them be during the summers from now on? or will they be interfering for letting Arya and Harry to live their lives?