Bucciarati and Doppio went to the colosseum as the young man spotted Mista nearby. 

Doppio: Mista?! Did he see me? No, he was looking up at the colosseum. I can't be too careless. 

Bucciarati: What's wrong? We haven't even finished crossing the street. 

Doppio: It's nothing. Just- Sorry, this cut on my throat. It kind of started bleeding again so it's not your fault. It's not even bleeding all that bad! If the Boss were here, he might choose to kill Bucciarati now. But if I were to attack, Mista would find me! 

He then saw him turn around. 

Doppio: Sorry, but I'm in a hurry. 

He tried to leave, only for Bucciarati to stop him. 

Bucciarati: Sorry, but I'm in a hurry. Could you take me across now? 

Doppio: NO! STAY DOWN! There's another car! We'll cross once that one passes by! 

As he said that- 

https://youtu.be/NzDp0AihwDM

Bucciarati: What? What was that? 

Doppio: I uh ... 

https://youtu.be/NzDp0AihwDM

Bucciarati: What are you doing? 

Doppio: Why is he calling now of all times?! He's going to blow my cover!! 

https://youtu.be/NzDp0AihwDM

Doppio grabbed a phone out of his briefcase! 

Doppio: WHAT THE FUCK IS WRONG WITH YOU?! WHY ARE YOU CALLING ME NOW OF ALL TIMES?! 

Diavolo: Stay calm, Doppio. You have done well. This is quite a feat! I was right to trust you. He will not find you out. You have proven that. And you have solived this puzzle! Bucciarati is already a corpse! That is why he is so cold to the touch! He does not breathe, and he has no pulse either. Not since we met at Venice. He cannot see, and his eardrums were burst in the battle with Secco. What he sees is something else. 

With you... 

You, Giorno, and Trish were nearing the colosseum. 

(Y/N): Trish, you have to get back inside of the turtle! 

Giorno: We don't know if it's safe yet! 

Trish: No, my Fath- Diavolo, he's here! 

(Y/N): HE IS?! Then by all means you have to- 

???: Hey, you guys are here already? 

(Y/N): Mista! 

As Mista found you, Giorno, and Trish, Bucciarati began to see Doppio as- 

Bucciarati: T-Trish? Is that you? 

Diavolo: The spiritual forms of me and my daughter share  similar scent! I have given you only that portion right now. All Bucciarati sees is the form of my daughter! Make him guide you! Play along ad make Bucciarati guide you to his objective! 

Back with your group... 

Mista: He's seriously near us? 

(Y/N): Yeah. Trish, where is he? 

Trish: He just suddenly appeared! I know he's around here somewhere. But I don't know where. 

Mista: Damn it! And the colosseum is massive! 

(Y/N): Damn it Polnareff, where are you? 

https://youtu.be/rjXy_36VaWg

Doppio and Bucciarati entered as Bucciarati continued to talk. 

Bucciarati: On the outskirts of Naples, Trish, it's not much, but I have a small house there. Once it's all over, if you have nowhere else to go, you can live there. Ther'es a school nearby, and some good restaurants too. It's even close to the beach. You've been through a whole lot, but you should be able to enjoy a wonderful life there. 

Doppio: Where should we go now? 

Bucciarati: Upstairs. 

The two continued and- 

???: STOP! If you take even a single step up those stairs, our agreement is nullified!

Polnareff appeared. 

Bucciarati: My name is Bruno Bucciarati! We have come here because you told us you had a potential method to defeat the Boss! 

Polnareff: I know, it is good that you have defeated your pursuers. However, I would like for you to understand that I must be very cautious. Who is that person next to you?! I have no record of that person anywhere in my data. 

Bucciarati: That is to be expected. Trish is not a part of the Gang, she only became involved with them four days ago. But as you can see, she is a part of my gang. 

Polnareff: Trish? That's a girl's name. 

Bucciarati: Why does that matter? Is there something wrong with being a girl? 

Polnareff: Perhaps I was out of line. It's hard to see in this darkness. Is she a Stand User? 

Bucciarati: Yes, are you happy now? How about you tell us who you are? (Y/N) mentioned that you're an old friend. Get to the point. 

Polnareff: Not yet. I'd like to see your Stand, Trish. Move slowly, stay right there! 

He started to come with the arrow coming out. 

Doppio was horrified as- 

Diavolo: WHAT?! YOU! IT CAN'T BE! I KILLED YOU! 

https://youtu.be/mCLj0WQgCYQ

Suddenly Doppio vanished. 

Polnareff: Bucciarati! Where did she go? 

Back with your group... 

(Y/N): NO! NO NO NO NO NO NO! 

You were sensing Diavolo's chi! 

(Y/N): POLNAREFF! HE'S IN DANGER! 

Giorno: (Y/N), do you mean- 

(Y/N): YES! DIAVOLO IS CLOSING IN ON HIM! This is the same feeling I felt when I first saw him in Venice! TrisH! 

Back with Polnareff... 

Doppio: This is a trial. The trial of defeating my past. I accept it. 

He walked towards Polnareff and removed his shirt, and- 

Polnareff: Y-YOU! 

Diavolo (The Boss of Passione, Father of Trish, and the Mastermind behind the Drug Trafficking! He's a vile and devilish man who will erase anyone who gets in his path or knows about his identity! Stand: King Crimson!) 

Diavolo: The past, even when you break it to pieces and entomb it in stone. It crawls out like a worm. What a surprise, I would have never expected you to be the mysterious revolutionary. What have you come here for? What were you trying to tell Bucciarati and his Gang? 

Polnareff: Don't climb these stairs! I have the high ground! You are beneath me! 

Then he felt blood coming from his finger! 

Diavolo: I don't think so. That arrow, did you find that in Egypt? Why did you bring the Arrow here? I thought just one would be enough, but is it that important? What are you trying to do? What will you use it for Polnareff? Once you go down to hell, nothing you do with that arrow will save you! NOW DIE! 

Polnareff: SILVER CHARIOT! 

Polnareff summoned his Stand and he slashed Diavolo across the arm! 

Diavolo: Your timing is genius, if I were a little bit closer, I would have taken serious damage. 

Polnareff: Damn it all! Diavolo made it here before (Y/N) and the others did! This may be the end for me, but I must protect this hope at all costs! 

Using Silver CHariot, Polnareff launched himself in the air! 

Diavolo: KING CRIMSON! 

He summoned his Stand and began to skip time! 

Using the blood on his arm, he spread it across Polnareff's face! 

Diavolo: Once time resumes its progress, you will no longer be able to count those droplets of blood. I have now surpassed the mistakes of my past! 

But then he saw Silver Chariot get stabbed with the arrow! 

Diavolo: WHAT?! I don't know what's going on, but- 

He tried to hit Polnareff only for a bright light to shine! 

Silver Chariot stared to transform and then it escaped with the arrow! 

Diavolo: IMPOSSIBLE! CHARIOT IS A CLOSE-RANGED POWER TYPE! IT SHOULDN'T BE ABLE TO REACH MORE THAN TWO METERS AWAY! WHAT DID YOU DO POLNAREFF?! IS THE ARROW CAPABLE OF DOING MORE THAN BRINGING FORTH THE STAND TALENTS OF A HOST?! IS IT BECAUSE YOU USED THE ARROW TO PIERCE YOUR STAND?! 

Polnareff: This is a gamble. A gamble to prevent Diavolo from obtaining the arrow. That arrow is our only hope. I didn't want to show him this, but now that I'm useless as a fighter, I no longer have the power to control it. 

Diavolo: HOW DARE YOU!

He punched a hole into Polnareff's chest! 

Silver Chariot was starting to fade! 

And you sensed- 

(Y/N): POLNAREFF! NOOOOOOOOOOOOOOOOOO! 

His chi was slowly fading. 

Diavolo: It seems that over the years, you discovered an incredible secret within the arrow! And then you waited for the right moment, but Ponlareff, it's too bad for you! 

He grabbed the arrow! 

Diavolo: THE ARROW IS MINE NOW! 

He then saw the lifeless man before him. 

Diavolo: You have done an excellent job in service to me. Now I jut need to solve the mystery of this arrow. 

As Polnareff looked upwards, he saw the spirits of Avdol and Kakyoin. 

And then- 

Diavolo: Wh-What?! Who ... are ... you? 

A figure appeared. 

Diavolo: STOP RIGHT THERE! DROP THE A- 

But he was overpowered by the figure, who took the Arrow. 

And then, everyone passed out.