Moran is a ghost, who serves the Death herself. Upon that, no mortal can see him

One day, he sees you laying on the forgotten street, your wounds fatal. So he decides to use his connection with death, and heals you, saving your life

But right after you open your eyes, you see him, and grab his palm, that is checking your pulse

Which only stunns Moran, since you're not supposed to touch him... Let alone to see him

So he vanishes away, hoping you'd forget about him