Knife is a famous murder weapon chopping up fruits and vegetables, although it's the first murder weapon introduced in the series. He appeared as an inanimate butcher knife in the first episode, but in No More Mr. Knife Guy, he appeared as a character after cutting Ginger, he has his own theme song sung by Peter Coffin, in the end of the episode, he got sharpened by Sharpener.
|Annoying Orange Characters|
|Season 1 Introductions||Orange • Pear|
|Season 2 Introductions||Passion Fruit • Grapefruit • Liam the Leprechaun • Carrot • Pacman • Grandpa Lemon • Midget Apple • Pepper • Feta • Sausage • Cheddar Cheese • Marshmallow • Knife • Gourd • Carrot • Mandy|
|Season 3 Introductions||Cantaloupe • Apple • Baby Carrot • Zoom • Bunny Rabbit • Yam • Mama Orange • Mama Knife • Mama Pear • Mama Apple • Mama Marshmallow|