Fake Heiress's Legacy

The lowly 14 year old concubine daughter of a equally lowly man of Xiao clan's branch family, one day she receives a chance at a new life. She's no longer the talentless girl bullied by most servants and family alike. She's now seen by the world as the arrogant villainess daughter of the Xiao Clan's main branch. Will she become the mask she's expected to wear? Or will she choose to live life her own way despite her new status. He, a blood thirsty ruler desires her after seeing past her arrogance. He, the love of her previous identity hates her current one. As she gains the power to protect what she holds close, will she reign in the blood thirsty beast? Or will the old life's love see past her current identity?