Shadow the Kitten

Not to be confused with Shadow 

Shadow is a black kitten who looks harmless and cute at first glance. However, she is actually vicious and especially does not get along with other pets.

She made her debut in Cute On The Outside, But Fierce On The Inside. Originally meant to be a one-time character, she was later made as a recurring one.

Starring

 * Cute On The Outside, But Fierce On The Inside

Featuring

 * Sugar Rush

Trivia

 * She is similar to Whistle.
 * Her first victim is Kit-Kat.