Mrs. Rumplekittykat

Mrs. Rumplekittykat is the prized pet of Biffy Goldstein who often comes to detention with him. Biffy initially thought that Mrs. Rumple was a Mr. but was proven wrong when she gave birth to a litter of kittens. Biffy often uses Mrs. Rumple in Lee Ping's missions, using the cat as both a distraction and an incognito spy camera.

Biffy has often taught Mrs. Rumple above average skills, for example, teaching her how to play the piano via the keyboard app on his phone.

His cat is also playful with Biffy's yarn and can get herself a bit...tied up.