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.
you're the first one to ever land 
a blow this close to my location.
أنت أوّل شخص يوجّه ضربةً ضمن
هذه المسافة القريبة من موقعي
bist du der erste, dessen Schlag
zumindest in der Nähe war.
eres el que ha estado
más cerca de golpearme.
eres el que ha estado
más cerca de golpearme.
C’est la première fois
de ma longue suite d’assassinats.
nessuno aveva mai sferrato 
un colpo così vicino a dove mi trovavo davvero.
é a primeira vez que alguém
passa tão perto da minha localização.
Я давно убиваю людей, 
но ты такой первый.