- "My energy... gone... I... lost! But you will be lost too, if the Wind Fish wakes! Same as me... you... are... in... his... dream..."
- — Grim Creeper
The Grim Creeper is the mini-boss of Eagle's Tower, the seventh dungeon in The Legend of Zelda: Link's Awakening. He is skeletal in appearance and has a cowardly disposition. He attacks with his Keese-like servants, which he refers to as his "brothers".
Link encounters the Grim Creeper approximately halfway through Eagle's Tower. After a small introduction, the Grim Creeper will play a flute to summon a flock of Keese-like monsters. To defeat him, Link must destroy each of these before they leave the room; if he misses any, the Grim Creeper will continue to summon them. Once the Keese have been dispatched, the Grim Creeper will flee for a time. He returns for the final boss battle, riding on the Evil Eagle.
Though unlikely, it is possible that the Grim Creeper is not actually evil. Since he is part of Nightmare's army, it is likely that he is just trying to take over the island, but when he is defeated he speaks as if Link is the bad guy, giving off the slight impression that he may be fighting to protect the island rather than control it, and the only way to do so is to stop Link from awakening the Wind Fish.
The meaning of the words that the Grim Creeper utters before its defeat is unknown. It could be that the Grim Creeper did not know that Link came from beyond the island and that if he awakened the Wind Fish, the dream of Koholint Island as well as Link's existence would both fade away.
Another theory is that if the Wind Fish was to be awakened by means other than the Instruments of the Sirens, Koholint Island and Link would both disappear.
The Grim Creeper's name is a play on the Grim Reaper, a term used for the personification of death.