Sickle Weasel (カマイタチ Kamaitachi), or Sonic Weasel, is a Kamaitachi that spins so fast that it looks like a tornado. They appear in Stage 1 of Ghouls 'n Ghosts. These monsters are invincible while attacking with their tornadoes; however, they are extremely easy to avoid (not counting they appear only at one part of the stage).