Eustace Melville, better known as Stacy, is a close friend of Ben Killian, and a "professional troublemaker". Stacy is involved in a number of illegal activities, including identity forgery. He also claims to be a taxidermist. Stacy is known for his laid-back and blase nature, and was unwittingly dragged into helping Ben rescue Alana and Daisy. He has a fondness for pizza, banana cream pie, and money. He possesses the ability to heal illnesses and injuries, and apparently had the ability to bring one person back to life. The exact rules of this are unknown, but Stacy murdered Julian Hamilton and shortly thereafter resurrected Ben. In 2007, Stacy was sent via time travel to an unknown year, along with Ben and Daisy.