Grey Mourner is a character in the video game Hollow Knight. She is a large, moth-like creature who resides in the Resting Grounds, a hidden area of Hallownest. Grey Mourner is a mysterious figure. She is never seen speaking, and her motives are unknown. However, she is clearly mourning the loss of someone or something, as evidenced by her constant weeping. Grey Mourner plays a minor role in the game's story. She is not a boss, and she does not provide any essential information. A fanart Hollow Knight cursor with Grey Mourner.