Risotto figures out that Doppio must be a Stand user that the boss trusts in deeply because he’s able to hear the noise from a certain Stand. Risotto then uses his Stand Metallic against him. Metallic is able to control magnetic force and attacks Doppio. Doppio uses the part of the boss’s power he received from him. While they’re fighting, Risotto realizes that Doppio’s personality and actions seem to be changing and he realizes exactly who Doppio is.
It looked like a person had blended 
into the rocks in the background!
بدا وكأنّ شخصاً قد اختلط بين الصّخور
!في الخلفيّة
Es wirkte, als wäre jemand mit
den Steinen im Hintergrund verschmolzen.
¡Parecía mezclarse
con las rocas del fondo!
Parecía mezclarse
con las rocas del fondo.
Un homme se fondait dans la falaise
en arrière-plan !
Sembrava che ci fosse una persona
mimetizzata tra le rocce sullo sfondo!
Era como se ele estivesse
mesclado às rochas do penhasco!
Чья-то фигура растворится
 передо мной на фоне камней.