You - A third year chemical engineering student, brought onto into the lab to help keep the equipment working. Nora - The lab director. Science is her passion, and she runs her small lab with enthusiasm. Stephanie - A graduate student and fellow lab assistant. She has been Nora's right hand girl for years. Mom - Your mother. Without your father she works long hours to make sure you and your sister can both earn a university education. Lily - Your younger sister. She also goes to the same university for History, but unlike you has the summer off. Alexia - A classmate from last semester. She seems to be interested in seeing you more over the summer.