Who Gabrielle the Uncorrupted?

Gabrielle, known as Allegra Van Alen in this cycle, chose the same faith as the Blue bloods to help save them and to be with her parents, so her twin (or bond mate), Micheal, known as Charles Force, followed her.

she broke the bond with her twin by marrying a red blood, and had Schuyler. When he died she swore to never take a familiar and because she didn't feed on blood she slipped into a coma.