The person hiding in the mirror was Illuso from the Hitman Team. Fugo ends up being dragged into the mirror by Illuso's Stand, Mirrorman. Fugo then summons his own Stand, Purple Smoke. Despite Giorno wanting to find Fugo, Abbacchio decides to go look for the key, since that was their mission. However, once Abbacchio finds the key, he also gets dragged into the mirror world...
Getting the key and protecting 
the boss's daughter...
...الحصول على المفتاح وحماية ابنة الزعيم
Den Schlüssel bekommen und
die Tochter vom Boss beschützen …
conseguir la llave
y proteger a la hija del jefe.
conseguir la llave
y proteger a la hija del jefe.
récupérer la clé
et protéger la fille du parrain,
Deve recuperare la chiave
e proteggere la figlia del boss...
Obter a chave e proteger a filha do chefe...
мне важнее всего исполнить приказ,