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 can stretch, bend, and 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." She has also been seen to frizz out her tail when Lord Monochromicorn first spoke to her on-screen.

Appearance
She doesn't look much like Jake aside from their body proportions. She has white eyes in which the black pupils become circular if surprised, excited, shocked, or scared. She has a cat muzzle and a small nose (compared to Jake's), cat ears, white fur with many coffee colored spots, and a large bushy tail. When Fionna and Cake race Prince Gumball, when Cake runs up the mountain, she has claws on her front paws.

Trivia

 * Cake's name is a play on Jake's name and is also based on Natasha's cat, Pancake.
 * Cake knows Morse Code because she can understand Lord Monochromicorn, similar to how Jake can understand Lady Rainicorn, who speaks Korean.
 * Fionna has taught Cake to change form on command, including a "morningstar mode".
 * Cake plays a hammered dulcimer, as opposed to a viola.
 * A cat's fur does "frizz out" if it is agitated or worried.
 * As shown in the artwork, she appears to be afraid of Marshall Lee.

Quotes
See Cake/Quotes.