Sweety is shorter than Tuffy, even though she is more than a year older at 5. Her tiny stature means that she cannot achieve many of the physical tasks that are so important for the ongoing welfare of the group. As her name implies, she loves everyone. She is the first to intervene if any of the other girls is down or injured in some way.
All Sweety has to do to make them feel better is to sit beside them, hold them, smile and speak some soothing words.
As we will find out later, she has a remarkable ability to heal others, simply through the power of love. This will become extremely important as some dangerous challenges face the McLittles.