Who Knotted Up the Octopus?

The Octopus is a workaholic. Chef Panda has decided to hire her for his restaurant where she does almost everything. But the chef has therefore fired his old employees: the Elephant, Vampire Bat and the Ostrich. Which one of them could have wanted to take revenge and tie up the Octopus legs together? At the same time, Sherlock claims that he cannot ever be surprised, he's always on his guard.