Demon Slayer: as a Doctor, I Control Wuhan

I am Fusha, and I have come to the peaceful era of demon-destroying worlds! I am the first ghost in the world! I am also a doctor! As for my current patient, his name is Ubuya Shiki Tsukihiko! As a good person, how could I let such a fragile life pass away? So I squeezed out a drop of blood from my heart and mixed it with the potion that can turn me into a ghost! But I'm missing one piece of material, and that's the blue Hibiscus flower! It's not that I don't want to let go, but now that the Blue Flower is on the other side of the sea, there's nothing I can do about it. So Wuhan, you will forgive me... Right?