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...
His hand is in grave condition right now.
...يده في حالةٍ حرِجة الآن
Wegen seiner Hand schwebt
er ernsthaft in Gefahr.
Su brazo está en muy mal estado…
Su brazo está en muy mal estado…
Son bras est sûrement
dans un état grave.
La sua mano è in condizioni gravissime ora.
A mão dele está em péssimas condições...
Он… отрубил себе руку.