Final answer:
The violinist Elie meets in Auschwitz is Juliek, a character from Elie Wiesel's memoir 'Night', representing a beacon of humanity during the horrors of the Holocaust.
Step-by-step explanation:
The violinist Elie meets in Auschwitz is Juliek. Juliek is a fellow prisoner and musician who Elie encounters in the concentration camp. In a poignant scene, despite the dire circumstances, Juliek plays a piece of Beethoven on his violin, creating a moment of beauty and humanity amidst the horror of the Holocaust. This account is found in Elie Wiesel's memoir 'Night,' which documents his experiences during the Holocaust, including the time he spent in Auschwitz and other concentration camps.