Sillabub (or Jemima) is the youngest, most innocent member of the tribe. She has a wide-eyed innocence that no other character has. After all, she is the one who breaks all the barriers and, in essence, rescues Grizabella. Being the most innocent works out to everybody's advantage, seeing as how they decide to welcome Grizabella back into the tribe. I believe that, if she hadn't spoken up, they might have never seen the light. - Kitty Gato