Alpha or Human? (HTTYD fanfiction)

What if Hiccup had an older sibling that was born a female runt like him and the Viking tradition was to name the female runt of the litter a Jaybird? What if, instead of Valka, Jaybird was taken away from her family, at the age of five, by a Night Fury?

Follow the story of Berk as they grieve the 'death' over Hiccups older sister. Twenty years later, Hiccup stumbles upon a young woman who can't recall where she was from before she became one with the dragons. What will happen when an old enemy of hers arrives and swears revenge on her and anyone who helps her? Will her memory ever come back or will it be gone forever?