"cook" is a character costume in StrikeForce Kitty.
The fox wearing the "cook" costume is found on first level with "minion" below the bridge near the start of the level. Wearing the set requires defeating the fox multiple times until all four pieces are obtained, or by unlocking chests.
The costume contains: chef's hat, apron, rolling pin, and pan lid. "cook" does melee damage and has the special ability to block damage at a 20% chance.