Grimm, or more commonly known as the Evil Cat, is the villain of the webcomic Sister Claire.


Grimm is a devilish feline who has an undying hatred for nuns, especially Sister Catharine. It also absolutely loathes holy water, and it was left with a foreshadowing detail that Claire's Holy Watergun could destroy it. It appears and takes possession of Sister Catharine and through her, attacks the Sisters of Mercy. It also tried to capture Claire and claimed that it could give her the truth.