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...
You're finished. Take this!
!انتهى أمرك. خذ هذه
Mit dir ist es nun vorbei!
Friss das!
¡Se acabó! ¡Toma!
¡Se acabó! ¡Toma!
Fais tes prières, mon gars !
Sei finito! Prendi questo!
É o seu fim! Tome isto!
Ты труп! Получай!