Stardust Crusaders - Chapter 8 
The Power Called a "Stand" (「スタンド」という
While Joseph is waking up and Jotaro is about to go to school, Avdol finds Holy unconscious on the kitchen floor. He discovers that, just like Joseph and Jotaro, Holy has developed a Stand. As Holy is a kind and gentle soul without any fighting spirit, the Stand has turned against her, acting like a disease.
Joseph says that there's only one way to save Holy: find DIO and kill him. He and Avdol deplore the fact that Hermit Purple's photos can't help them find him, but Jotaro's Stand manages to spot something in the photo's background. It's a fly, which Avdol recognizes as a species living only in the region of Aswan, in Egypt.
Kakyoin announces that he wants to go with them. When Jotaro asks him why, Kakyoin first answers that he doesn't know himself, then that it's only because Jotaro saved his life.
Avdol gives the name "Star Platinum" to Jotaro's Stand, according to the tarot card he pulled, the Star.