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...
They're heading toward the dog mosaic.
إنّهما متوجِّهان إلى فسيفسائيّة الكلب
Sie laufen zu
dem Hundemosaik.
Se dirige al mosaico de perro.
Se dirige al mosaico de perro.
Ils se dirigent vers la Cave Canem.
Stanno andando in direzione
del mosaico del cane...
Estão indo na direção
do mosaico de cachorro...
Он бежит к мозаике «Берегись собаки».