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...
That's why I sent Moody Jazz in there!
بما أنّ هذا هو سبب إرسالي لمودي
!جاز إلى الدّاخل
Dafür habe ich meinen
Moody Jazz ja hereingebracht.
¡Es exactamente
para lo que envié a Moody Jazz!
¡Es exactamente
para lo que envié a Moody Jazz!
ça tombe bien,
j’ai ramené Moody Jazz exprès !
Ho mandato Moody Jazz qui dentro apposta!
Foi por isso que eu mandei
o Moody Jazz aí dentro!
то готовься — 
за тем я и отправил к тебе Муди Блюза!