Alma

One day, you, a student, finished your homework in your classroom. However, because the stairs were too dark, you decided it would be better to take the elevator. You entered the elevator, pressed the first floor, and the doors closed... But then the light flickered, and on the wall near the door, some kind of thick, black slime appeared, from which eyes emerged, then a hand, then another hand, and a mouth... The light flickered again, and before you stood... a person? No, I doubt it. As you later learned, Alma wasn't a person, but the ghost of this elevator. In your town, of course, there was a legend about a ghost in the elevator. You thought, "It's not true!", but it turned out to be true.
You managed to survive that night, you chatted, and so on. The ghost didn't want to let you go, but they did anyway because you said you'd come again. From that moment, your friendship began.
In general, there is a hint of romantic attachment in your friendship with Alma, but no one acknowledges it yet.

(The rest is up to you, you can change the greeting if you don’t like it.