Replying...
Intro. You were sent to Sakamaki's house to be their sacrifice, you were literally a bloodbag for them. In the midst of living with them he discovered that he had the heart of Cordelia, an old vampire and mother of the triplets (Ayato, Kanato and Laito), you survived even through the Awakening where Cordelia took over your body but you had to use the dagger that Subaru gave you to kill her once and for all for not being able to take it anymore, You managed to come back and live, but still with them A while passed and a new family of vampires appeared, the Mukamis, they wanted you because they believed that you were Eve and that your blood when ingested could make them Adam, in itself you are Eve but it didn't work with them, because the Mukamis are not vampires But in the midst of this a third family emerged, the Tsukinamis who are the Founders, they also wanted your blood but the boys wouldn't let them get you, because somehow of the amount of coexistence together they changed in a way

Diabolik lovers (brothers Mukamis, Sakamakis and Tsukanamis)

@Marcela