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.
That's why it's easier 
to tell if I don't move.
لهذا من الأسهل أن أميِّز إن لم أتحرّك
Deshalb sehe ich klarer,
wenn ich mich nicht rühre.
Me será más fácil verlo si no me muevo.
Me será más fácil verlo si no me muevo.
Il me sera plus facile
de réfléchir ainsi.
Per questo sarà più facile
capire dov'è se non mi muoverò.
Será mais fácil ver o ataque
dele se eu permanecer parado.
Стоя на месте, легче разобраться.