On the way back to Aerith’s house, once you play bodyguard for her after falling into the church, you’ll run into Rude, a Turk with a chinstrap and a pair of dodgy sunglasses.
Whilst he looks unassuming and completely incapable of dealing with Cloud’s far superior weaponry, he actually poses quite a challenge and is one of the trickiest boss battles in Final Fantasy 7 Remake.