Genshin Impact X Tensura Crossover!

Lumine was minding her own business when a Fatui suddenly ambushed her. That very Fatui was a Harbinger, Rank 3 "The Doctor". With her consciousness fading she began to assume the very worst. She thought she heard a voice before she completely became unconscious.
"Get..away...from-...sister!"
When she had come to again, all she saw around her were rocks and rock walls in an unbelievable darkness.
It was there that she met a slime and began her "Journey" on Tensura.