Piglet is a close friend of A.A. Milne's Winnie the Pooh. Piglet is small and shy, and fears the Heffalump.
Alas, Piglet is actually evil. He's the embodiment of Jack the Ripper, as anyone who saw the relevant episode "Wolf in the Fold" of Star Trek (the original series) knows.
Voice of Piglet from the Enterprise computer: "Die, Die! Horribly Die! Kill You All! Make You Suffer!".
Character actor John Fiedler, who played the villain in the episode, was the longtime voice of Piglet until his passing in 2005. I'm still traumatized.