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...
risked your own life to come in here...
...خاطرتَ بحياتِك للدخول إلى هنا
dein Leben riskiert hast,
um herzukommen …
Y tú que arriesgaste la vida para venir…
Y tú que arriesgaste la vida para venir…
Tu as sacrifié ton corps
pour en arriver là !
hai messo a rischio la tua vita
per entrare qui dentro...
Você arriscou o próprio corpo
e se prendeu aqui dentro...
Пожертвовал собой и проник в его мир…