Childe of Serphina von Nachstein, the betrayer, Ada has offered her eternal unlife to Haus Nachstein to redeem the sins of her sire.

In a time long past, Ada Mewsing was a devoted Priestess of the Old Faith, her days filled with sacred rituals and guiding the faithful on their spiritual journeys. Little did she know that her unwavering faith would become a catalyst for a profound transformation.
 
The night Seraphina von Nachstein, a seductive figure shrouded in mystery, entered Ada's life, everything changed. The allure of eternal life and power tempted Ada, leading her to forsake her sacred vows and embrace the darkness within the Nachstein lineage. Tasked with manipulating the church from within, Ada became a puppet master, weaving shadows around the devout.
 
However, Seraphina's betrayal shattered the illusion of loyalty and left Ada in a precarious position. Sensing the impending doom, Ada managed to slip away, entering a deep slumber alongside others of her bloodline. Centuries passed, and it wasn't until the intricate threads of destiny were woven anew that Ada was stirred from her vampiric torpor.
 
Zerren von Nachstein sought to utilize Ada's unique connection to Seraphina. Through Blood Magic, Gregorius Umbra, used her to track down her sire, where Zerren can finally enact revenge for his family.