Cake

Cake the cat is the gender (and species) swapped version of Jake the dog, created by Adventure Time character designer Natasha Allegri and featured in the episode "Fionna and Cake." She has Stretchy Powers and can morph her body just like Jake. Cake travels with Fionna, and Lord Monochromicorn is her boyfriend. As a cat, she also possesses the ability to see in the dark. It is also shown that whenever danger is around, the fur on her tail stands on end or "frizzes out" (just like when she sensed). Her tail also frizzes out when Lord Monochromicorn first speaks to her on screen.