HP: Hybrid Is King

A young girl died unexpectedly, and her soul traveled to the orphan Mia Heranli in the world of Harry Potter. I wanted to live my whole life in a cowardly manner, but I awakened to the system of manifesting saints in front of others, and I will be punished if I don't participate in the plot? Face death threats if you don't complete the task? As a mixed-race orphan, Mia had to stand up again and again. "You let me see the shadow of Snape in his youth." "Slytherin's rare courage, you should come to Gryffindor" "Putting aside your bloodline, your mind and skills are worthy of being in Slytherin." In the process of getting along with each person, Mia went from being dedicated to the task to treating each other sincerely. Maybe they have mixed blood, but Slytherin never cares about his origin, only the strong. (There is a system, the system contains alien items, OOC warning, the protagonist will save the dying people in the original work, including but not limited to Sirius, Cedric, Dumbledore, Snape..., No official matching, female CP, emotional drama is not the focus, mainly plot and rescue, CP is the eldest lady of Lacey Black branch x Mia Heranli)