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.
Why didn't you move immediately 
after seeing the footage, Doppio?
لماذا لم تتحرّك فوراً بعد رؤية المقطع
يا دوبّيو؟
Warum bist du nicht direkt gelaufen,
als du das gesehen hast, Doppio?
¿Por qué no te moviste
en cuanto viste las imágenes?
¿Por qué no te moviste
en cuanto viste las imágenes?
Si tu es conscient du danger,
pourquoi ne t’es-tu pas déplacé ?
Doppio, perché dopo aver visto il futuro 
non ti sei allontanato subito?!
Por que você não fugiu
depois de ter a visão, Doppio?
Доппио, почему сразу после видения
 ты не сорвался с места?