Daphne Greengrass read Avada to herself and turned into a wandering spirit wandering in the place of nostalgia. Real souls not ghosts. During this period she discovered her own strange abilities.
The keen Bryce discovered her traces and used dementors to make her disappear completely, but she was accidentally reborn into the British royal family.
I set Xiaoha to be born in 1986, and so on.