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's times like these that you should 
remain calm before doing anything.
في أوقاتٍ كهذه ينبغي أن تبقوا هادئين
قبل القيام بأي شيء
Gerade jetzt heißt es Ruhe bewahren,
bevor man irgendetwas tut.
En momentos así
deben calmarse antes de actuar.
En momentos así
hay que mantener la calma.
Au moment d’attaquer,
il faut rester calme.
È in momenti come questi che bisogna
restare calmi e riflettere prima di agire.
Nessas horas, o importante
é manter a calma antes de agir.
Как раз сейчас нужно 
работать с холодной головой.