Shop › K-pop Demon Hunters Keychain - Derpy Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 K-pop Demon Hunters Keychain - Derpy £6.00 Follow me eyes effect! Double sided, acrylic keychain with a metal clasp. Add To Cart Added! Follow me eyes effect! Double sided, acrylic keychain with a metal clasp.