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...
Do you understand now, Giorno, you shithead?!
!هل تفهم الآن يا جورنو اللّعين؟
Verstehst du es nun,
Giorno, alter Dickkopf?!
¿Ya lo entendiste, maldito Giorno?
¿Ya lo entiendes, maldito Giorno?
J’espère que ce tocard de Giorno
aura compris.
Hai capito le mie intenzioni,
Giorno, brutto coglione?
Já entendeu meu plano, Giorno, seu palerma?
Теперь тебе ясно, Джорно? 
Проклятая ты бестолочь!