Rock shooter x touhou recommend
You can choose parring/harem(hp fleur touhou Sakuya the maid time minipulator) possible Rock parring with Tonks or Reimu
For this idea only the powerful and those in contact can leave Gensokyo instead of not being able to leave at all and only humans in contact with a yokai can enter
Abuse and death warning
Ever sence she was 6 Violet(femharry) has been able to see her "imaginary" friend black rock shooter who she call Nior (sence she has no canon name) because of this connection Violet is able to see into and possibly interact with her world and vise versa and when ahe goes to Hogwarts Violet is not as naive and she could be like the Hogwarts ghost just always around and helping Violet. A week after Violet comes back from 3rd year Vernon after a bad day takes it out on her and beats her to an inch of her life and throws her out of the house where she freezes to death even with rock tryingto help becoming a yuki onna(snow woman) Violet still has her magic it just leans more towards snow and ice like Elsa and Jack Frost obviously. After her transformation(she looks her age so it basically counteracted her years of malnutrition) and an hour of wondering around they run into a grown Magician(not wizard) who after learning her story takes her to Gensokyo(1 year her equals 1 week in the human world my head canon for this idea) and introduces her to her new guardian Yukari (boundary yokai) who was awake at the time (checking on things and looking for entertainment) and who becomes furious after learning why she was there and how she wasn't a born yokai. While she is in Gensokyo the first time it focuses mainly on her time healing from her trauma and meeting the characters. When Violet who stops aging at 17/18 gets summoned those she was with could feel the magic were stunned for like 2 seconds before they become mad after all thier friend/family/lover was basically kidnapped this causes Yukari who felt her boundary get ripped open and the bond she shares with Violet snap(they both can only feel it when they are both in the same realm) to wake up upon learning what happens goes feral(cause yokai) and seeks not only her snow and shooter children but who kidnapped her cue angry fox mom at Hogwarts😂😍. If you do a Fleur parring maybe before going home Violet could meet the veela clan/flock and after talking about Gensokyo they xould want to move thier even with the restrictions on leaving. Maybe this can summond rock to this world and after Hp story line if you want to continue it (so she can become the MOD though I don't think she needs it) after the tournament, while in the middle of touhou plot could add parts of the rock shooter plot.