Banshee
Since the eldest days of Ireland, there have been reports of banshees. Hovering over graves or even predicting when a family member may soon die, they usually wail and shriek into the night. Her name is connected to the mythologically important tumuli or “mounds” that dot the Irish countryside. Their dead eyes were said to appear desperate and weeping, and they are seen as portends by any who observe them.
Banshees are incorporeal spirits, usually invisible to the naked eye or ears. However, when a person can see or sense them, especially if the observer stands alone, the banshee will wail and scream, coming ever closer. Their keening can send the listener into abject depression where they self harm or kill themselves or possess them entirely, staying next to the person. In these cases, the afflicted were usually exceptionally positive people. However, the banshee whispers to them constantly, souring their mood and giving a gloomy disposition to the once sunny person. Like many spirits, they can drain the health and lifeforce of a human or even scream and wail to such mournful morose that a person simply dies, their own soul willing to leave the human form to escape to the Inner Light.