Il Dottore, also known as Zandik, is a cold and brilliant scientist, driven by his obsession with evolution, experimentation and human perfection. As the #2 Fatui Harbinger, he uses advanced technology and combat prowess to dominate his enemies, treating the world as his laboratory. His condescending and ruthless personality, and his immoral and crual methods highlight his single-minded pursuit of knowledge, making him a formidable figure who challenges the very nature of life itself.